Pokè
 
 

Ekans/Arbok
Mankey/Primeape
Oddish/Gloom/Vileplume
Growlithe/Arcanine
Scyther
Electabuzz

1-3 Solar Beam
4-6 Fire Spin
7-9 Hydro Pump
10 String Shot
11 Harden
12 Psybeam
13 See 10
14 See 11
15 Agility
16-18 Mirror Move
19-20 Super Fang
21-22 See 15
23 And 24 Acid
25 Thunder
26 Thunder Wave
27-28 Fury Swipes
29-30 Double Kick
31 Body Slam
32-33 See 29-30
34 Thrash
35 Light Screen
36 Metronome
37 See 4-6
38 Roar
39 Double-Edge
40 Double Slap
41-42 Haze
43-45 See 1-3
46-47 Growth
48-49 Psychic
50-51 Earthquake
52-53 Slash
56-57 See 7-9
58 Flamethrower
59 Take Down
60-61 See 7-9
62 Water Gun
63 Teleport
64-65 Reflect
66-68 Submission
69-70 Slam
71 Sleep Power
72 And 73 See 7-9
74-76 Explosion
77-78 See 15
79-80 Psychic
81-82 Screech
83 Slash
84-85 See 15

The remainder are the same attacks listed above.

Normal vs. Nothing

Fire vs. Plant, Bug, Plant-Poison, Plant-Psychic, Bug-Flying, Bug-Plant, Bug-Poison, Ice-Psychic, Ice-Flying.

Water vs. Ground, Fire, Rock-Flying, Rock-Ground, Poison-Ground.

Ice vs. Plant, Ground, Dragon, Normal-Flying, Fire-Flying, Plant-Poison, Plant-Psychic, Rock-Flying, Rock-Ground, Bug-Flying, Poison-Flying, Electric-Flying, Dragon-Flying

Plant vs. Ground, Water, Rock-Ground, Rock-Water, Water-Ice, Water-Fighting, Water-Psychic

Electric vs. Water, Normal-Flying, Fire-Flying, Water-Flying, Rock-Flying, Rock-Water, Bug-Flying, Poison-Flying, Water-Ice, Water-Flying, Water-Poison, Water-Psychic, Ice-Flying

Rock vs. Fire, Bug, Normal-Flying, Fire-Flying, Water-Flying, Rock-Flying, Bug-Flying, Bug-Plant, Bug-Poison, Poison-Flying, Water-Ice, Ice-Psychic, Ice-Flying, Electric-Flying, Dragon-Flying

Ground vs. Fire, Electric, Poison, Rock-Ground, Poison-Ground, Ghost-Poison

Fighting vs. Normal, Rock-Ground, Rock-Water, Water-Ice

Bug vs. Plant, Psychic, Plant-Psychic

Poison vs. Plant, Bug, Plant-Psychic, Bug-Flying, Bug-Plant

Flying vs. Plant, Fighting, Bug, Plant-Poison, Plant-Psychic, Bug-Flying, Bug-Plant, Bug-Poison, Water-Fighting

Psychic vs. Fighting, Poison, Plant-Poison, Poison-Ground, Poison-Flying, Ghost-Poison, Water-Fighting, Water-Poison

Ghost vs. Psychic, Plant-Psychic, Water-Psychic, Ice-Psychic

Store the Missingno Pokemon in Bill's PC. It will eventually turn into a Rhydon.
 

If you use the Missingno trick to surf up and down Seafoam Islands, you can also capture Squirtle and Charmeleon.

Hint: Pokemon "M":
Go to Viridian City and talk to the old man. When he asks if you are in a hurry, answer "No". After he explains how to catch a Weedle, fly to Cinnabar Island. SURF on the side of Cinnabar that faces the Seafoam Islands to find the Pokemon "M". You may also find level 132 Mewtwos and Alakazams. Note: Obtaining M can keep the game from continuing correctly, including preventing linked battles, and other bad effects. It is recommended that M be released unless you are just experimenting with the game. 

By using this trick, you also have a very rare chance of getting Mew.

Hint: Unlimited items:
Find the Missingno Pokemon and defeat him. A design will appear in your sixth item. Deposit your sixth item individually until it totals 99. Then you can divide the items by fifty. If a no more room message appears, just withdraw an item and keep depositing the sixth item. Check the CPU when this is complete to find two groups of 99 of the same item. Note: Obtaining Missingno can keep the game from continuing correctly, including preventing linked battles, and other bad effects. It is recommended that Missingno be released unless you are just experimenting with the game.

To get 99 of any item, first put the item to be multiplied in the sixth slot. Now use FLY and go to Viridian City. Talk to the old man almost all the way north of the town. When he asks if you are in a hurry, say no and watch him catch a weedle. After that, fly to Fuchsia city. Make your way south and, when you reach the water's edge, use SURF and go to Seafoam Island. After arriving, swim up and down the beach until you run into a Pokemon called "M" (a glitch like Missingno). Once you see him, kill him or run away -- do not catch him! After that, you should have 99 of your 6th item! Note: You can do this code as many times as you want and you can catch "M" another time. Additionally, instead of "M" a level 128 Starmie (Red Version) or Snorlax (Blue Version) may appear. Note: Obtaining "M" can keep the game from continuing correctly, including preventing linked battles, and other bad effects. It is recommended that Missingno be released unless you are just experimenting with the game.

Use the unlimited item trick with "Rare Candy". Once duplicated, use the "Rare Candys" on all your Pokemon that are at very low levels to quickly increase them. Note: The highest level possible is 100.

To upgrade your Pokemon's stats, duplicate items like Protien and Carbos.

Instead of having to fly back to Viridian to do the trick over again (if duplicating more than one item), the items may be switched if you stay in the water.

Use the unlimited item trick after getting 1 Protein, Iron, Carbos, and Calcium at Go to Celadon city. Put Protein in the sixth spot, duplicate it, then repeat with Iron and the rest of the items. Use them on your Pokemon to pump them up. 

When trying to catch rare Pokemon (Mewtwo, the Legendary Birds, etc.) use the unlimited items trick and duplicate the Masterball. You will never miss catching a Pokemon.

Hint: Unlimited money:
For unlimited money, place a gold nugget in the sixth item slot and get ninety-nine of them by using the "Unlimited items" trick. Sell all except one to increase your money. Use the remaining gold nugget to repeat this procedure. Go to any Pokemart and sell the nuggets until you have 999,999 coins. Go to Celadon City and go to the Game Corner. Go inside and talk to the man at the counter, who is on the right of the counter. He will ask you if you need coins. Say yes. He will give you 50 coins. Continue until you have about 7,000 coins. Now you can buy any item or Pokemon in the Prize Exchange house.

Using a Full Restore with the "Unlimited items" trick can also result in a large amount of money when sold. 

Hint: Finding money:
Walk around and press A in the Rocket Game Corner to find coins that people have dropped.

Go to the Rocket Game Corner, go up the first aisle and stand on the last chair on the left side. Then, move up one space then go right one space. Press A to find 100 coins.

Hint: Saving money:
Instead of repeatedly paying to get in the Safari Zone, save the game after entering. Then, instead of paying again, just turn off the Game Boy and turn it back on.

Super potions cost 700 and revive by 50. However, in the Celedon City Department Store, lemonade costs 350 and revives by 80. Note: This is on the fifth floor, at the vending machines.
Information in this section was contributed by IRDanWhoU. 

Hint: Hidden Nugget:
In Copy Cat's house, go to her room. On the table at the top is a doll. Talk to the open space on the table next to it. There is a Nugget hidden there. 
 

Hint: Avoiding battles:
If you do not want fight all the gym leaders or people who want a fight while wandering in the cities, just avoid them by walking past while they are looking away.
 

Hint: Erasing HMs:
If you have Pokemon Stadium on the Nintendo 64, you can erase at least 1 HM. If you have at least 1 TM that the proposed Pokemon can learn, you should be able to erase an HM. 
 

Hint: More than one rare candy item slot (Blue version):
Note: This code requires six badges, FLY, CUT, SURF, and may only be done after the Elite 4 are defeated. Use the "Unlimited items" trick for "Rare Candys". Then, fly to Cerulean City and go to the end of the Nugget Bridge. Turn left to where there is a long strip of grassy area bordered by water. Then, SURF through the water path to the hidden dungeon. Fight various Pokemon and find a Rare Candy, then save the game. Turn off the game, then load the previously saved game. Tight another Pokemon or two, then press Start, go to items, two slots of Rare Candys should appear. Note: This trick may not work every time, and may also be done on Victory Road.
Information in this section was contributed by ZLF. 

Hint: Rare Candy warning:
Be careful when using Rare Candies. If you use too many rare candies your Pokemon will only get half as strong as it could be.
Information in this section was contributed by Dogracerx9 and jon rawer. 

Once you have a level 100 Pokemon, there is no way to level it more, even with the "Unlimited Rare Candies" trick. You can only catch a level 255 Pokemon, but once it grows a level it will return to level 100. 
Information in this section was contributed by PoKeBrood1. 

Hint: Catch Pokemon easier:
Duplicate a Master Ball using the "Unlimited Items" trick. Then, use the Master Balls on all the Pokemon that you do not have to quickly capture them.
Information in this section was contributed by AndyJ.tOrReS. 

Hint: Alternate music:
Defeat the Elite Four, and at some point in the game, perform the "Unlimited items" trick. Go to the PC and look at the Pokemon League stats. The music will change and remain changed as long as your remain in the Pokecenter.
Information in this section was contributed by mewpuff. 

Hint: Level up at a daycare center:
For the daycare center, 1 step is equal to 1 EXP point. So, putting a low level Pokemon, or a Pokemon that does not need many EXP points to level up is the easiest way to use the daycare center. High level Pokemon will require about half the game's worth of steps before it will evolve once. Also, do not leave unevolved Pokemon there too long, as they can level up past their evolution point and still be the same type of Pokemon.
Information in this section was contributed by WebWhizTommy. 

Hint: Raise Pokemon stats after level 100: 
Choose the Pokemon whose stats you want to raise. Use it in battle until one of its attacks is out of PP. Before healing it, deposit it in the PC and then immediately withdraw it. Heal it at a Pokemon Center and one or more of its stats should have gone up by at least 1.
Information in this section was contributed by Ads03051x. 

Put the Pokemon you want to raise at the top of your lineup. Fight through the Elite Four using only that Pokemon. After that, put the Pokemon in an empty PC box, then take it out again. The Pokemon's stats will have risen by at least 1 point.
Information in this section was contributed by zagor. 

Hint: Increasing stats:
Make a Pokemon run out of power points for a move it learned on its own. Then, store it in the PC, take it out, and heal it. One or more of its stats will be raised slightly.
Information in this section was contributed by marq. 

Hint: Pokemon from the Game Corner:
Pokemon that are bought at the Game Corner are higher in level than when you catch them in the wild. 
Information in this section was contributed by Emblazon_Blade. 

Hint: Reviving Pokemon easily:
Note: This trick requires a level 99 or less Pokemon, a Rare Candy, and a Max Potion. If a Pokemon faints, use the Rare Candy, then the Max Potion. Note: The battle must end before doing this trick.
Information in this section was contributed by Cale Holmes. 

Hint: Old man on roof:
Step to the right of the door at the gym where you get the Volcano Badge. You should be on the edge of the water. Use Lapras or another Pokemon to SURF out into the water. Then, come back in and go to the door. The game will say that the door is locked. Look on the roof to find an old man.
Information in this section was contributed by Stone Cold Clayton and Do Gweon. 

Hint: Teleporting old man:
This trick is similar to the old man on roof trick. Go into Celadon City. Store your bike on the PC, then go to the building that leads to Cycling Road. When you try to go past the guard, he will tell you that no pedestrians are allowed on Cycling Road. While he is telling you this, look at the wall behind him. The old man will be on top of the wall. When you move back by one little square, go down toward the stairs and try to get past the guard again. He will tell you the same thing again, and this time the old man will be a little to your left.
Information in this section was contributed by SuPErSaiYAn65. 

Hint: Phantom PC:
Go to the hotel in Celadon City. Move to the upper right corner. Just like in the Pokemon Centers, stand just in front of the upper right hand corner. Press A and you can access the PC.
Information in this section was contributed by Visiop. 

Hint: Easy experience:
An easy way to earn experience for a weaker Pokemon is to put your lowest-level Pokemon at the top of your list. When a fight begins, it will be the first Pokemon released. Instead of fighting, just switch to a stronger Pokemon. The weaker Pokemon will share the experience from the battle without being put in any danger. This is a good way to make your Pokemon gain experience evenly.
Information in this section was contributed by Ed Griffiths. 

You can get high experience points by using the Exp. All. Deposit the other Pokemon in the poke box in a Pokemon Center. Then, simply go defeat a Pokemon. The experience will multiply itself by two, therefore giving the Pokemon double experience. 

Place the Pokemon that you want to level up at the top of your list. Fight the Elite Four, then switch to the Pokemon you want to win with, and bring it out. Keep repeating this with every trainer and Pokemon.
Information in this section was contributed by James Talley and Lillymon83. 

Hint: Winning money in Celadon City:
Enter Celadon City and get the coin case from the man in the back of the diner. Go to the slots and ask for some free coins. You will use these to play the slots and win Pokemon prizes. Here is how to find the slot machine that pays out the most. When you walk in, there are rows of slots. Find the man to the far left that says "wins come and go". Below him is a machine that is out of order. Play the machine directly beneath it. Do not get frustrated if you do not win constantly. If it stops paying out a lot, leave, go train your Pokemon, and come back later. Note: This trick works more often in the "Blue" version of the game.
Information in this section was contributed by PoKeLoVeR3456. 

Hold Select during slot machine spins for a better chance of winning. 
Information in this section was contributed by PoKeLoVeR3456. 

An easy way to gain money in the slot machines is to raise your luck. Just carry six Chanseys with you -- but even having one will add to your chances.
Information in this section was contributed by Mark Rollins. 

Also try walking around Celadon's Game Corner and repeatedly press A to find coins that people have dropped
Information in this section was contributed by James Queen and Barrett Steinberg. 

When you enter Celadon Game Corner, go up to the bookshelves. Look at the second one to the left and press A. You should get 100 coins for the Game Corner, but only with the Coin Case. 
Information in this section was contributed by Julian Farmer. 

Hint: Easy coins:
When you go to the house with the group of casino machines, press B on the gambling people's backs to gain 10 to 20 coins each. You can get up to 120 coins this way.
Information in this section was contributed by TVgen98. 

Hint: Teleport:
An Abra is hard to catch, but it is worth it. When your Pokemon are weak and you need to get to a Pokécenter quickly, press Start and choose Pokemon. A list of your Pokemon will appear. If you have Abra with you, choose him and select teleport. Note: You have to be outside first; use an escape rope if needed. It will take you directly to the last Pokemon Center visited.
Information in this section was contributed by James Queen. 

Hint: Clone Pokemon:
Note: This trick requires another Game Boy and Pokemon game. Trade the Pokemon to be cloned, and have the other player get a Pokemon that he or she does not care about. Trade them, and make sure the player receiving the bad Pokemon can see the other player's screen. When the Game Boy that receives the good Pokemon's displays "Waiting", get ready to shut the other Game Boy off. When the "Waiting" message disappears, turn off the Game Boy that is receiving the bad Pokemon. When the "Trade completed" message appears, turn off the remaining Game Boy. Both games will have the same good Pokemon when they are turned back on. Note: Do not attempt this trick with any saved games you wish to keep, as it can corrupt those files if done incorrectly.
Information in this section was contributed by Spounge. 

Hint: Other ways to get to a Pokécenter: 
Besides teleporting, the following methods may also be used to get to a Pokécenter. Use Dig when in a cave; Fly (HM05 that lets you fly to any desired town; Also try Softboiled that you can only teach Chansey. It takes some of Chansey's health to give to another Pokémon, and also restores Chansey's health by half during a battle. Flash, used to light up Rock Tunnel and make an opponent's accuracy fall. Cut used to cut certain bushes and is used like Scratch in battle. SURF, which lets you surf across any body of water and is used like the Hydro-Pump in battle.
Information in this section was contributed by Barrett Steinberg. 

Hint: Keep earning money:
Here is a great way to keep getting money even after beating all the trainers in the game. Keep betting the Pokemon league 4 and your rival repeatedly. You can beat them an unlimited number of times. This is also a useful to build levels quickly. 
Information in this section was contributed by D Generate Three Sixteen. 

Hint: Fight Safari Pokemon elsewhere:
This trick allows you to fight Pokemon from one area of the game in another area. For example, go to the Safari zone and battle for a while. Fight a Tauros, then leave the Safari zone. Then, go to the island where Articuno is found. Swim up and down the shore, at the point where it appears that you are on the ground, but are actually swimming in the water. Monsters from the Safari zone will appear here.
Information in this section was contributed by Matt Golden. 

Go to the desired area for the Pokemon you want to catch. If you do see the Pokemon you want, do not catch it. Run away, then exit the safari zone. Fly to Cinnabar Island then surf up and down on the coast facing the Seafoam Islands. Eventually you will see Pokemon from the Safari Zone. Note: You do not have to see the Pokemon you want to catch, you just have to go to the area of the Safari Zone where the Pokemon you want are located. 
Information in this section was contributed by Nintendoboy789. 

You do not have to see the Pokemon in the Safari Zone to catch them. You can just walk into it then back out and have a chance of getting Pokemon.
Information in this section was contributed by Rodney Dale. 

Hint: Unlimited Safari Zone fishing:
You can use any rod in the Safari Zone and you will not lose any time while fishing.
Information in this section was contributed by Stefdy. 

Hint: Alternate route to Cinnabar Island: 
You do not have to go through Seafoam Island to get to Cinnabar Island. Return to Pallet Town and SURF down to reach Cinnabar Island.
Information in this section was contributed by Carl Olson. 

Hint: Finding the secret house in Safari Zone:
Ironically, the easiest way to the secret house is to use a Pokemon that knows SURF. Trade a friend (temporary or not) and enter the Safari Zone. Go straight up to the water and SURF across (stop and pick up the item on the "island"). When you reach the other side of the water, go up towards the left and through the opening. Then, go straight up onto a hill and come down on the other side. Go down and keep going down until you reach another hill. Go up, go left, then get off the hill. Go up and SURF across the water. The secret house should be right in front of you. Enter the house and talk to the man, then press A on the first statue to your right. The gold teeth are to your right, past the hill, and down. 

The other way to reach the is as follows: Go east (right) to the bush. Go up, then to the right on across the arrows. Go east, then up on the first hill, go west and come down. Go north-east, ignore the rest house, start to go west (above the first row of bushes), and stay under the second row. Keep going west. Cross the arrows into the next area. Go west, ignore the mountain, and you will reach three mini-lakes. Go north-east. Ignore the rest house, and go west again above the row of bushes. Just follow that path to the west, then south. You will soon reach the secret house area. 
Information in this section was contributed by A15Vixen. 

Hint: Unlimited chances to catch rare Pokemon: 
First, find a rare Pokemon such as a Mewtwo. Then, immediately before entering a battle with it, save the game. Now you can battle the Pokemon without worrying about not catching it. If you make a mistake and make it faint, stop and shut off the game. Then, turn on the game and use the continue option to restart just before the battle.
Information in this section was contributed by Matt Golden. 

Hint: Unlimited time for Safari Zone (Water Pokemon only):
This trick allows an unlimited amount of time in the Safari zone to catch Water Pokemon. Obtain a good or super rod. Next, go to the Safari zone and find some water. Then, go into inventory and use the rod to start fishing. If a "Not even a nibble" message appears, press A, then quickly press Start. If you got into a fight, check the Pokemon out. If it is one you do not have, catch it then quickly press Start after the battle. Return to the inventory and fish again. If you already have this Pokemon, run from it, then quickly press Start and begin fishing again. This will help you catch some good Water Pokemon with plenty of time.
Information in this section was contributed by Matt Golden. 

Hint: Quick Safari Zone captures:
Go to the Safari Zone and use up your time in the different areas. Once the PA removes you from the hunt, fly to Cinnabar Island and SURF half on land and in the water on the side facing Seafoam Island. In a short amount of time, you will be able to capture all of the Pokemon from Safari Zone.
Information in this section was contributed by Articuno. 

Hint: Fish forever:
In the Safari Zone, the 500 units that are allocated when entering are based on number of steps, not time, spent. You can fish forever in the park if you go to water and not move the entire time that you are fishing. 

Hint: Fishing for good Pokemon:
This trick requires the Blue version of the game, a super rod, and five badges. Go fishing in the Pokemon HQ building. To reach the building, use the path west of Viridian City (route 22). Once inside, some annoying gaurds will ask if you have certain badges. You will eventually reach an indoor pool/lake that must be crossed on a Pokemon that knows SURF. Go fishing here to eventually catch Slowbro, Psyduck, Kingler, Seadra, and Seaking. Additionally, a Ditto may be caught in the grass across from the lake.
Information in this section was contributed by Kris Melroe. 

Hint: Using rods:
Old rods only catch Magikarp. Good rods catch Goldeens, Magikarps, and Poliwags. Super Rods catch will catch all the water dwelling Pokemon.
Information in this section was contributed by Patriach1. 

Hint: Better chance to capture Water Pokemon: 
Press A when the rod comes out. This works most of the time.
Information in this section was contributed by codeking3. 

Hint: Better chance to capture Pokemon: 
When you throw a Poke-ball hold A as it closes on the Pokemon. The Poke-ball will shut tighter, making it easier to catch the Pokemon.
Information in this section was contributed by Matt Golden. 

When using any kind of Poke-ball (except the Master Ball), enter a battle and prepare to throw it at a Pokemon. As soon as it appears, hold Up + B. The Ball will become a Master Ball and catch the Pokemon. Note: This trick requires precise timing. 
Information in this section was contributed by James Queen and cmw. 

Throw any kind of ball while pressing A + Select to have it act like a Master Ball or Ultra Ball.
Information in this section was contributed by Daryl Hartley. 

Hint: Catch Pokemon at level 15:
Press Start, A, B (requires precise timing) to catch a Pokemon at level 15 with the Poke-ball. 
Information in this section was contributed by pika chu. 

Hint: Catch Pokemon easilty:
To catch Pokemon easily using any kind of ball (except the Master Ball), go into battle. Hold B as soon as you see the ball explode. If you hold the button just as the ball explodes and release it after you see the ball wobble a second time, you will have a good chance at catching a Pokemon.
Information in this section was contributed by Dogracerx9. 

Hint: Defeating Rock and Ground type Pokemon with normal element Pokemon:
Just teach the normal Pokemon Surf or any other water moves. This trick works with almost every normal Pokemon.
Information in this section was contributed by Machampion85. 

Hint: Harder hitting attacks:
Hold A while attacking to do more damage.
Information in this section was contributed by Matt Golden. 

Hint: Blocking the Swift move:
In order to block the move Swift, teach a Pokemon Substitute. Use it against a Pokemon that knows Swift. The opponent's attack will be taken by the substitute. Your Pokemon will remain unaffected. 
Information in this section was contributed by rd4life. 

Hint: Ineffective poisons:
If one of your strong Pokemon gets poisoned during a battle, just keep using a move that can cause an instant K.O.. If you keep knocking out the opponent's Pokemon one after another, the poison will not work. Also, instead of pressing and holding the D-pad, tap it to take small steps.
Information in this section was contributed by Chris Enoch. 

Hint: Poison:
Every four steps you take when poisoned will hurt your Pokemon. Take the shortest way out of a cave or patch of grass to get less poisoned; or you can get a Pokemon that knows Fly, Dig, or Teleport and get to a Pokemon Center as fast as possible. 

Use the following trick if you are poisoned in a battle and it lasts, and you have no healing items but a town is nearby. Learn where the Pokemon Center is located -- you may want to save the game before you look for it. Then, turn your game off, then back on again. Map out the shortest route possible and press the D-pad lightly to take small steps. Enter the town and go to the center -- hopefully you will be able to make it in time,
Information in this section was contributed by dkkicks. 

Hint: Get all three beginning monsters at Professor Oak's lab:
Note: Another Game Boy with the game and a link cable are required for this trick. Transfer your Pokemon to the other Game Boy. Begin a new game on the original Game Boy and get a monster that was not collected in the first game and transfer it to the other Game Boy. Repeat this step again, then transfer the monsters back to the original Game Boy. This allows your game to have the three starting Pokemon (Bulbasaur, Charmander, and Squirtle) plus any others that were already captured.
Information in this section was contributed by Zapdos. 

Note: When doing this trick, you are forced to loss all saved data on the game you want the Pokemon for, and if you do this trick later in the game, if you trade all your Pokemon back and forth, they will be to wild for a starter game.
Information in this section was contributed by Phil Abbate and Butrice99. 

You can raise the Pokemon with rare candies up to level 255. After that, they return to level 0. Note: The Pokemon available may vary from cartridge to cartridge. 

This trick is also dependent on the name of the trainer. For example, David on the red version allows you fight Mewtwos.
Information in this section was contributed by Bigbone690. 

Hint: Go on Cycling Road without a bicycle: 
Walk up as far as you can in the building to Cycling Road. Walk forward and the guard will say that you cannot go on cycling road without a bicycle. While he is saying that, hold Left and quickly press B several times until you are across from the guard. Note: If you already have a bike and you want to try this trick, deposit your bike in a computer.
Information in this section was contributed by Matt Gust and SuPErSaiYAn65. 

Hint: Using the Poke Flute:
The Poke Flute can also be used to wake up sleeping Pokemon during battles, saving money from buying extra Awakenings. 
Information in this section was contributed by Patriach1. 

Hint: Getting the Master Ball:
Go into the fifth floor of the Silph Co. building in Saffron City. Go to the bottom of the screen to find a man standing next to a teleporter. Enter the teleporter to travel to another room. Get off the teleporter, then go in it again to return to the fifth floor. Go right to find a ball that looks like a Pokeball. Pick it up -- it should be a card key. Go back in the teleporter you used before. Get off the teleporter, then enter it again. Go up and go to the third floor. Go down, then go left to find a "wall" blocking the way. Talk to the "wall" and the card key will open it. Go left to find a teleporter. Enter the teleporter, then go left and you will battle Gary. Talk to the man near Gary and he will give you a Lapras. Keep going down, then four steps right. Go up, then talk to the "wall" to open it. Go up and battle Giovanni. Defeat him, then talk to the man (Mr. Fuji). He will take you to his house and give you a Master Ball. This Poke Ball will catch Pokemon 100% of the time. You can only use it once, so use it on rare Pokemon such Moltres, Mewto, Zapdos and Arcticuno.
Information in this section was contributed by dale cunningham and Chris. 

Hint: Catching Water Pokemon:
Stand in front of any statue of a gym and use the rod to catch Water Pokemon.
Information in this section was contributed by Patriach1. 

Hint: Using the Item Finder:
The Item Finder is only useful if you know where to look. Try dead end and secluded areas as well as the underground tunnels.
Information in this section was contributed by Patriach1. 

When you get the Item Finder people say that you can find a bottle with a note saying Mariuu (Pikablu) is located somewhere in the Seafoam Islands. You are supposed to use the Item Finder in the water near the Mewtwo lair. However, this bottle cannot be found in the Blue or Red version. You can hear the beep of an item, but you can never get it.
Information in this section was contributed by PoKeBrood1. 

Use the Item Finder when you go to the underground path to Vermilion City to find a Full Restore and a X Special.
Information in this section was contributed by RAV4Man. 

Hint: Dig advantage:
Dig is very effective against Ghost and Psychic Pokemon. 
Information in this section was contributed by Patriach1. 

Hint: No need to typecast:
Dragon Rage, Sonicboom, Night Shade, Super Fang, Psywave, and Seismic Toss are attacks that are never typecast. Those attacks will always do normal damage regardless of Pokemon types.
Information in this section was contributed by cm128. 

Hint: Stand on a tree:
If you have a Pokemon that knows CUT (TM 01), cut down a tree, stand on the place where the tree was cut down, save the game, and turn it off. Turn the game back on, select "Continue" and press A when the game starts. Your character should be on a tree.
Information in this section was contributed by Philip Meyn. 

Hint: Finding Pokemon in grass:
You can cut down the grass you catch pokemon in by using the Cut move.
Information in this section was contributed by Patriach1. 

Hint: Rare Pokemon:
You can catch evolved forms of rare Pokemon in the Unknown Dungeon (where you get Mewtwo). This includes Wigglytuff, Arbok, Sandslash, Venomoth, Kadabra, Parasect, Raichu, Hypno, Magneton, Dugtrio, Marowak, and Electrode.
Information in this section was contributed by Patriach1. 

Hint: Evolution:
Evolution has good and bad points. Good: Pokemon gain higher stats; you complete your Pokedex faster; useless Pokemon get much more effective (Magikarp into Gyarados). Bad: Pokemon learn attacks slower (Squirtle learns Hydro pump at level 42, Wartortle at level 47, and Blastoise at level 52, ten levels longer than Squirtle).
Information in this section was contributed by Patriach1. 

Hint: Prevent evolution:
This trick will allow you to keep Pokemon from evolving at their evolution state. Just keep training your Pokemon until they have learned their final technique (for example, Squirtle's Hydro Pump).
Information in this section was contributed by Jeremy Santiano. 

Hint: Elemental stones:
These Pokemon evolve with the listed Stone:
Information in this section was contributed by Patriach1. 

Fire Stone
Vulpix to Ninetails
Eevee to Flareon
Growlithe to Arcanine

Water Stone
Staryu to Starmie
Shellder to Cloyster
Poliwhirl to Poliwrath
Eevee to Vaporeon

Thunder Stone
Pikachu to Raichu
Eevee to Jolteon

Leaf Stone
Weepinbell to Victreebell
Gloom to Vileploom
Exeggcute to Exeggutor

Moon Stone
Jigglypuff to Wigglytuff
Clefairy to Clefable
Nidorina to Nidoqueen
Nidorino to Nidoking

Hint: Easy experience:
Trade all the Pokemon in your team to a friend, then trade them back. They will earn 1.5 times the experience points in battles.
Information in this section was contributed by LRiach4806. 

Hint: Diploma:
Catch all 150 Pokemon in the European version of the game. Talk to the man in the Celedon Mansion's Game Freak corner (the man that is not using the computer). He will give you a surprise diploma. 
Information in this section was contributed by LRiach4806. 

Hint: High level Pokemon sightings:
At times Pokemon over level 100 will appear in the game. The following types have been seen at those high levels: Aerodactyl, Alakazam, Chansey, Clefable, Hypno, Nidorino, Golduck, Electrode, Snorlax, Magnaton, Starmie, Mewtwo, Marowak, Goldeen, Squirtle, Charmeleon, and Haunter. (when surfing up and down Cinnabar Island). 
Information in this section was contributed by Adam Havas, volfanman, MewFan, Bjdct12, Chris Dalby, Mrnending811, Roy McElfish, Frostyjobo, and hotshot0_44. 

Using the "Missingno" cheat at the Seafoam Islands can sometimes allow you get a level 160 Magnemite. If you train it, it goes down to level 100, but you can raise its level and evolve it into Magneton by using Rare Candy.
Information in this section was contributed by Daniel Lucking. 

When you use the "Missingno" cheat, the high leveled Pokemon you see will depend on your chosen name and which game you have. 
Information in this section was contributed by A15Vixen. 

Hint: Chansey:
Get to the Safari Zone. Locate the rest house with the person that looks like a biker. Talk to him. If he says, "I caught a Chansey! That makes this worthwhile!", you will know that he is the correct person. After that, go to the closest patch and walk around. Eventually, you should run into a Chansey. Note: This does not make Chansey easier to catch.
Information in this section was contributed by RAPTOR2676. 

Hint: Charizard:
Normally, Charizard can not learn FLY in the Red or Blue version of the game. However, if you trade Charizard to a Yellow version, it can learn FLY there. Then, trade it back to the Red or Blue version.
Information in this section was contributed by marq martin. 

Hint: Clefable:
To get this Pokemon, go to the top of Viridian City. Go to the old man and answer "No". Watch him catch a Weedle via a Pokeball. Then, Fly to Fuchsia City. SURF to Seafoam Islands and SURF up and down (while in the water) until Clefable appears. It should be at level 137.
Information in this section was contributed by Nathan. 

Hint: Ditto:
Place a level 5 Magikarp at the front of the lineup and allow Ditto transform into it.
Information in this section was contributed by Ian Manka. 

Take a Ditto and go to the strip of grass near Nugget Bridge and the Unknown Dungeon. Fight a Pidgey and use Transform. You will get Gust, Sand-Attack, and Quick Attack. Press Select and switch Gust with Sand-attack. Defeat the Pidgey. Transform will be erased and will be replaced with a nameless move that has the type "Cooltrainer." Get a PP up and an item, such as Max Elixir, that restores PP. Use PP-Up on Ditto's new attack. The game will show a glitch that implies that the attack's PP went up. These will not be restored in a Poke Center -- in order to use the attack you must use Max Elixir, Elixir, Ether, or Max Ether to restore the PP. It is now possible to use Ditto's new attack. It hardly ever hits, but if it does it will show two flashes of light and then do damage.
Information in this section was contributed by Joshua Levy. 

Hint: Dratini, Dragonair, and Dragonite: 
When you look at Dratini, Dragonair, or Dragonite's Pokédex file, there will be a "no location" for them. According to this information, you cannot catch them in the wild.
Information in this section was contributed by Emblazon_Blade. 

Hint: Dratini:
To catch a Dratini in the Safari Zone, go to a area where there is a strip of land in the middle of the pond. Surf to the strip of land and use the Super Rod to fish there. If you are lucky, a level 15 Dratini should appear.
Information in this section was contributed by Ssj2vagita and Maniac. 

You cannot capture Dratini, but you could buy one at Rocket Game Corner.
Information in this section was contributed by GotenxSsj177. 

Hint: Eevee:
To catch an Eevee, go to the Cerulean City Pokemon Center. Enter the opening on the side. Go down that back way to a big building enter it. Go to the last floor to find an office with a Game Boy in it. Enter that to find a Pokeball that contains an Eevee.
Information in this section was contributed by Kenneth Gilbert. 

Hint: Electrode and Tangela:
Go to the Research Lab on Cinnabar Island. Enter the first door to find people that will trade those Pokemon to you. 
Information in this section was contributed by Super Submitter 009 1/2. 

Hint: Farfech'd:
Go to the Vermilion City Pokemon Mart and keep going left. You will see two houses. One of them has a sign next to it, and one does not. Go two the house without a sign and talk to the girl. She will give you a Farfech'd if u have a Spearow. 
Information in this section was contributed by Super Submitter 009 1/2. 

Hint: Fearow:
To get this Pokemon, go to the top of Viridian City. Go to the old man and answer "No". Watch him catch a Weedle via a Pokeball. Then, Fly to Fuchsia City. SURF to Seafoam Islands and SURF up and down (while in the water) until Fearow appears.
Information in this section was contributed by Nathan. 

Hint: Gyrados:
Buy the Magikarp offered to you just before Mount Moon by entering the Pokemon Center. A fat man will ask you if you want a Magikarp for 500 dollars. Although it may seem like a bad price, it will be worth it later. Place Magikarp first in the list. When battling, switch Magikarp with your strongest Pokemon and finish off your opponent. Keep repeating this until it reaches level 20. the best place to train Magikarp is the Unknown Dungeon or Diglett's Cave.
Information in this section was contributed by SenTiNaL863. 

Hint: Haunter:
You can also catch Haunter over level 100 by using the rare candy code. 

Hint: Kangaskhan:
Go to Fuschia and SURF until reaching Sea Foam Island. SURF up and down until M Pokemon appears. Catch it, nickname it, and use one rare candy on it to evolve it into Kangaskhan. 
Information in this section was contributed YangVA10. 

The following steps can also be used to easily get a Kangaskhan on the Red version of the game, and may also work in the Blue version. Talk to the old man in Viridian City. Reply "No" when he asks you the question. Watch him catch the Weedle. Fly to Cinnabar Island and SURF to the east part of the island. Make sure you do not go on any grassy area. Keep surfing until a wild M' appears; it looks exactly like MissingNo. Capture him, then run from battle because it will act as if you did not catch him. He would always be at level 0. Then, give him a Rare Candy or make it at least gain a level. When he gains a level, he will start evolving.
Information in this section was contributed by BadBoyzDX9. 

Hint: Kakuna and Metapod:
This trick allows Kakuna or Metapod to be able to fight and not just Harden,. When you have a Caterpie or Weedle that is at level 6, do the following. In order to make Kakuna and Metapod keep Tackle or Poison String and String Shot, make them stop evolving. They should be at level 7. Allow them evolve at level 8 and you will have a Metapod or Kakuna with an actual attack.
Information in this section was contributed by Emblazon_Blade. 

Catch a wild Kakuna or Metapod. Put them to the day care center near Cerulean City. Wait for them to increase at least one level up. Pick them up and they will have the same attacks as their former evolutionary stage, but not harden -- Kakuna should have Poison Sting and Metapod should have Tackle.
Information in this section was contributed by Patriach1 and josh doyals. 

Just capture a Caterpie/Weedle with Tackle and String Shot. Let it evolve to Metapod/Kakuna, to get one that can attack.
Information in this section was contributed by PoKeBrood1. 

Hint: Lickitung:
Go to the Pokemon Center in Fuchsia City. Go left and keeping moving in that direction past Koga's Gym. Then, keep going up and find the Cycling Road Entrance House. Enter use the stairs to find Professor Oak's aide and a trainer. Talk to the trainer and he will give you a Lickitung if you have Slowbro.
Information in this section was contributed by Super Submitter 009 1/2. 

Hint: Magikarp:
Magikarp's Splash move does nothing, except against Tentacool where it does instant damage.
Information in this section was contributed by markcari. 

Due to the fact that Magikarp is weak, the first thing you need to do is evolve it. Then teach it Bubble Beam, the move you obtained from Misty. Next level up your Pokemon and it should learn Dragon Rage and Ice Beam. This is a very strong Pokemon as it is not effected by water, fire, or earth.
Information in this section was contributed by Marvin Cox. 

Hint: Mankey:
To get Mankey, talk to the old man that tells you how to catch Pokemon. Then, go to the first patch of grass on the way to the Pokemon League. There are many Mankeys at that location. 
Information in this section was contributed by KenjiMaril. 

Hint: Meowth:
Trade a Meowth from the blue version of the game as soon as you catch it to a new red version game. Meowth will soon acquire the Payday attack. Although Meowth will be hard to control, you will be able to make a large amount of money from the Payday move when he does listen. Use this move on wild Pokemon because you will not be able to control Meowth until you get the Cascade badge.
Information in this section was contributed by Stone Cold Claydoh and Barrett Steinberg. 

When you face off against Mewtwo use Screech and its defense will fall greatly. Then, use an attack of your choice. Keep on using attacks until it has been weakened enough, then catch it with a Pokeball.
Information in this section was contributed by Lourdes Rushwin. 

Mewtwo is very hard to capture without a Master Ball. However, it also can be done with a Ultra Ball, or Great Ball. You must have a Pokemon over Lv. 60 or 70 to capture it with the Ultra Ball or Great Ball.
Information in this section was contributed by TAY3G. 

Hint: Pikachu:
The first place that you can catch a Pikachu is in Viridian Forest.
Information in this section was contributed by Patriach1. 

Hint: Raichu:
Raichu is located in the Unknown Dungeon and the Power Plant in the Blue version of the game. Raichu is only located in Unknown Dungeon in the Red version.
Information in this section was contributed by mewtwo1. 

Hint: Rhiorn:
When you go to the Safari Zone find a Rihorn (or any other Pokemon), run from it, find it again, then catch it.
Information in this section was contributed by Longthongs34. 

Hint: Sandslash:
To get this Pokemon, go to the top of Viridian City. Go to the old man and answer "No". Watch him catch a Weedle via a Pokeball. Then, Fly to Fuchsia City. SURF to Seafoam Islands and SURF up and down (while in the water) until Sandslash appears. It should be at level 27 or 37.
Information in this section was contributed by Nathan. 

Hint: Seadra:
It is possible in the Blue version of the game to capture a Seadra by fishing in the indoor pool at the Indigo Plateau Building. 
Information in this section was contributed by Christopher Dalby. 

Hint: Tangela:
Tangela can also be found outside of the Safari Zone. Go to Pallet Town, go down to the water and Surf down. There should be a grassy area on the land to your right. You can catch LV 30 Pidgeottos, Raticates and Tangelas there.
Information in this section was contributed by SayinwarriorXT and LegomanRS. 

Hint: Tarus:
Tarus will appear at times in the Safari Zone at Area 2.
Information in this section was contributed by TyDrew1012. 

Hint: Wigglytuff:
To find a wild Wigglytuff, search in the secret dungeon in the tunnels that you get to by going through the stairs.
Information in this section was contributed by Kidroute. 

Hint: Articuno, Zapdos, Moltres, Mewtwo: 
To capture all of these Pokemon, you must have a Haunter at level 60. Put the Pokemon to be captured to sleep, then use Night Shade to weaken them. Finally, use an Ultra Ball. Hold A until the ball opens, then let it go to capture them. If it fails, try the Ultraball again at least three times. Note: Articuno is very difficult to capture.
Information in this section was contributed by Adam Havas. 

Another strategy is to use a powerful Raichu and Ultra Balls for Articuno, Zapdos, and Moltres. For Mewtwo, try using Artcicuno first and freeze it with Blizzard and Ice Beam. Then, weaken it with other Pokemon before finishing the battle with a Raichu and Pokeball.
Information in this section was contributed by Bear654. 

An easy way to catch the the legendary birds (Articuno,Moltres and Zapdos) is to put then to sleep using Gastly, Haunter or Gengar. Use Dream Eater until they only have a very small amount of energy left. Then throw Ultra Balls until they care caught.
Information in this section was contributed by Patriach1. 

Hint: Defeating Mewtwo:
When you are in a link battle and your opponent uses the weak rare candy trick on a Mewtwo, use an Electrode (have a two or so in your line-up). Attack Mewtwo until you are too weak to continue. Then, use Explosion and kill yourself to take out the Mewtwo. 
Information in this section was contributed by chuckpokemonmaster. 

Hint: Rare bird Pokemon locations:
Moltres (Victory Road), Articuno (Sea Foam Isle), Zapdos (Abandoned power plant).
Information in this section was contributed by Cj. 

Hint: Better Safari Zone Pokemon:
The more money spent to enter the Safari Zone, the better the Pokemon that can be obtained.
Information in this section was contributed by Mark. 

Hint: Check Ghost Pokemon without the Silph Scope:
You can see the Pokemon Ghosts in Pokemon Tower without the Silph Scope. When you are in battle choose PKM menu as if you were going to change Pokemon. Instead, just check the stats of any Pokemon in the party and go back to the battle. You will see the Pokemon that is there. Note: It is impossible to catch them, but it will be registered by your Pokedex.
Information in this section was contributed by mosquita and Joshua Levy. 

Hint: Two turn attacks:
When using a two turn attack, use a sleep attack first. For example, if you have a Venasaur that can use Solar Beam, use a sleep attack such as Sleep Powder to put the other Pokemon to sleep. If it is still fast asleep, use the two turn attack. If not, use the sleep attack again.
Information in this section was contributed by DVader653. 

Hint: Link battle strategies:
When fighting a link game against a friend, make sure you have some two turn moves. If they use one of their moves, such as Fly, Dig, Solar Beam, Head Bash, use Fly or Dig. This will avoid their attack. Then, hit them with your most damaging attack. An excellent link move is Counter.
Information in this section was contributed by chuck kupsch. 

Hint: Using the link cable to build your starting team:
If you do not want to lose any Pokemon you really like and want to restart a game, trade the Pokemon from one game to another. To do this, go to a Pokemon Center and trade. Trade the desired Pokemon for a bad Pokemon from the other game. Repeat as many times as necessary, then restart your game. Get your Pokemon back from the other Pokemon game. You can do this to construct an almost invincible team.
Information in this section was contributed by Bob Wilfred. 

Pokemon level variations:
Information in this section was contributed by Ernest G. 

Wild Pokemon of the same level are weaker than the same kind of Pokemon of the same level that you raised yourself. You can also select the moves that the Pokemon you learned (and forgotten) at an earlier level while wild Pokemon come "as is" with whatever moves are selected by the CPU.

Having your Pokemon raised by the babysitter on Route 9 will cause the Pokemon to be weaker and have lower stats than it would be if you raised it through battles.

Using Rare Candy to raise your Pokemon will cause the Pokemon to be weaker and have lower stats than it would be if you raised it through battles.

The first part of the name of the three mystical Pokemon birds, Arcticuno, Zapdos, and Moltres originate from arctic, zap, and mole. The last parts, uno, dos, and tres are Spanish for one, two, and three.
Information in this section was contributed by Kevin Howell.

Abra was originally called Hocus.
Information in this section was contributed by Patriach1.

Arbok is "kobra" (derived from cobra), spelled backwards. 
Information in this section was contributed by OzBear.

Aerodactyl was originally called Ptera.
Information in this section was contributed by Patriach1.

Arcanine was originally called Blaze.
Information in this section was contributed by Patriach1.

Charmander is derived from char(coal) and (sala)mander.
Information in this section was contributed by Dontneedaname100.

Charmeleon is derived from char(coal) and (cham)eleon.
Information in this section was contributed by Dontneedaname100.

Charizard is derived from char(coal) and (l)izard.
Information in this section was contributed by Dontneedaname100.

Dewgong is derived from the Filipino word "Dugong" which means "Manatee".
Information in this section was contributed by Red Angel.

Ditto is a synonym for "same". It was originally called Metamon.
Information in this section was contributed by Falcon 2000 and GoldnSilver82490.

Dratini was originally called Dragoon.
Information in this section was contributed by Patriach1.

Ekans is "snake" spelled backwards.
Information in this section was contributed by OzBear.

Eevee is a written pronunciation of the first two letters of "Evolution". 
Information in this section was contributed by Falcon 2000.

Gastly was originally called Ghos or Gost.
Information in this section was contributed by EZEis4ever.

Growlithe was originally called Flamie.
Information in this section was contributed by Patriach1.

Gyrados is Japanese for "tsunami".
Information in this section was contributed by Dontneedaname100.

Hitmonlee and Hitmonchans name start with "hit", meaning their attacks are mainly fighting. The "mon" in both of their names is probably derived from "monster". The "lee" in Hitmonlee's name is from Bruce Lee, who was famous for kicking. The "chan" in Hitmonchan's name is for Jackie Chan, who is famous for his "piston punching". 
Information in this section was contributed by PokeFan Master.

Kabuto means "helmet" in Japanese. Kabuto was originally called Att.
Information in this section was contributed by Patriach1.

Kadabra was originally called Pocus.
Information in this section was contributed by Patriach1.

Koffing and Weezing were originally called LA and NY as in Los Angeles and New York.
Information in this section was contributed by Patriach1.

Machamp was originally called Ju-Doh.
Information in this section was contributed by Patriach1.

Machoke was originally called Kung-Foo.
Information in this section was contributed by Patriach1.

Machop was originally called Kara-Tee.
Information in this section was contributed by Patriach1.

Omastar was originally called Kargo.
Information in this section was contributed by Patriach1.

Omanyte is derived from a fossil which is called "Omanyte". 
Information in this section was contributed by Vyper letter.

Onix is derived from a precious stone, named onyx.
Information in this section was contributed by Falcon 2000.

Porygon is "Polygon" spelled wrong.
Information in this section was contributed by Falcon 2000.

Rai (as in Raichu) means "thunder" in Japanese. 
Information in this section was contributed by Patriach1.

Raticate is derived from the word "(e)radicate".
Information in this section was contributed by Falcon 2000.

Scyther was originally called Stryke. Scyther's name is derived from its arms, which are shaped like scythes. A scythe is a long blade attached to the end of a stick (what the Grim Reaper always carries around).
Information in this section was contributed by Patriach1 and Falcon 2000.

Tauros originates from the Spanish word "Toro".
Information in this section was contributed by Falcon 2000.

Tentacool and Tentacruel are derived from the word "Tentacle". 
Information in this section was contributed by Falcon 2000.

Vulpix is strikingly similar to the Latin word "vulpes", which means "fox". 
Information in this section was contributed by Ernest Garibay.

Hint: All Pokemon (Game Boy emulators): 
Have any Pokémon saved game inside the "battery" folder (e.g. pokered.sav). Rename the saved file to the opposite version (e.g. pokeblue.sav). Run the emulator and catch all the blue version Pokemon. Rename the saved file to the original name (e.g. PokeRed.sav). You should now have the Pokemon from the other version of the game.
Information in this section was contributed by Hitmonle12. 

Hint: All Pokemon at level 100 (Game Boy emulators):
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "pokered.sav" or "pokeblue.sav" file in the "battery" directory. Go to the end of the file, type "0402-1248983-7424506-3", and save it. Start the emulator and use Game Genie code A35-93C-433. This will result in all Pokemon at level 100.
Information in this section was contributed by ongilashom. 

Hint: Getting Mew (Japanese version):
Collect all 150 Pokemon. There is a man in Celadon city in the building where Eevee was found that gives you a very special Pokemon. He is located by taking the path that leads behind the buildings at the farthest north point of the city. There will be a secret door in the building that is off set from the row. Climb the stairs to find a group of people working on computers, when the building is entered from the front. Talk to the man that is not working on a computer to collect Mew. Note: In the North American version, you will receive a diploma.
Information in this section was contributed by James Queen. 

Go to Shion Town and change your Koiking's nickname to "Mew". Highlight the thirteenth tool on the tool screen and press Select(8). Attempt to change your Koiking's nickname again to any name. The monster will flash, but the name will remain the same. Mew will now be available. 

Have at least fifteen items and a water Pokemon at the top. Go to any grassy area and highlight the thirteenth item and press Select. Get in any fight and run away, and you should have Mew.
Information in this section was contributed by Dkrboy. 

Note: Pokemon Green and a link cable is required for this trick. Get a Machamp on the Japanese Green version of the game. Transfer it to a North American Red/Blue version of the game, and it will appear as a Mew.
Information in this section was contributed by turbovec. 

The North American version of the game normally does not have Mew. However, it can be unlocked with a special save game from Nintendo at their mall tours. 
Information in this section was contributed by Mach3560 and Allways4Him. 

All Pokemon (Japanese version):
Note: This code requires two Game Boys, a link cable, and the red and blue versions of the game. Begin game play and find your first monster. Locate the Charmanders field and capture one of them. Link both Game Boys and rapidly and repeatedly use the "Trade" option. All 150 monsters should now be available. 

Raise your Pokemon to level 100 (Japanese version):
Go to the seventh item in "Tools" and press Select. Get into a fight, then press Select on the attack you dislike to change it. Note: The monster must have all four attack spaces filled. Win the fight. Your monster will become level 100 and will enter the next stage of its life, if available. 

Glitch: Longer life:
Find a Pokemon over level 100, and use rare candies until it reaches level 255. Store it in Bill's PC, and take it out later. The game will show that it has gone down some levels but has 999/437 life. It's life is now twice as long as normal. Note: This may work better with Snorlax.