Pokémon Yellow/Blue/Red are three gameboy games that were released in Japan in 1995 and is still as popular as ever. Pokémon is a Role Playing Game with a bit of a twist. You don't fight yourself, you fight using trained Pokémon. Using the link cable you can challenge another player and trade Pokémon. In the beginning of the game, Prof. Oak lets you choose from three Pokemon: Squirlte, Charmander, or Bulbasaur. He also gives you a PokéDex, an encyclopedia of Pokémon he wants you to help complete. Your mission is to battle your way through the large world and catch as many Pokémon as possible. There are 150 Pokémon, so you have a lot of work ahead of you. Many trainers and Team Rocket will try to slow you down along the way, as well as your long time rival, Gary.

Note: None of these codes work for Pokémon Yellow

GameShark Codes

Unlimited Money:
(this takes up three slots)
019947D3
019948D3
019949D3

Unlimited PP for a Pokémon in battle only:
Infinite PP (1st poisition) 01282DD0
Infinite PP (2nd poisition) 01282ED0
Infinite PP (3rd poisition) 01282FD0
Infinite PP (4th poisition) 012830D0

Infinite items in certain positions:

Other GameShark Codes:

01151ED1 - Start with Mew
01017CCF - Buy Master Balls for free in any Pokémart
0115D8CF - Fight Mew in every battle
01151ED1 or 0115D8CF - Start off with Mew
01FF16D0 - Invincible
01033CD1 - No Random Battles
0199A4D5 - Infinite Game Corner Coins
01F00ED7 - Infinite Safari Zone Time
016447DA - Infinite Safari Balls

To fight any Pokémon; enter 01xxD8CF (make the xx into the numbers and letters corresponding to the Pokémon you want) Now go somewhere and fight Pokémon, the picture may be scrambled, but when you catch it, it will be normal.

Non-GameShark Tips/Codes

Fish on Misty's Gym:
You need: Old Rod
1. In Misty's Gym, face the statue and use Old Rod.
2. You should be able to fish.

Stand on top of a tree:
You need: Cut
1. Cut down the tree that you can cut.
2. Stand on the spot where the tree was and go to menu and save.
3. Turn the game off, then turn it on again and continue.
4. When you start the game, you should be on top of a tree. 

Easier way of catching Pokémon:
You need: PokéBalls
1. When you are in battle with a wild Pokémon, Throw a Pokéball.
2. Hit the A buttion and press the right arrow krey repeatedly.

Easy Level Gain:
To easily gain experience, simply switch the Pokémon you want to train with the top Pokémon on your list. When you go into battle the Pokémon will pop out. Then switch to another Pokémon. When you win the battle the beginning Pokémon and the fighting Pokémon will get experience points.

Evolving Pokémon with Stones:
Some Pokémon won't evolve untill you give them a stone. Here are the Stones:

F = Fire Stone
T = Thunder Stone
W = Water Stone
L = Leaf Stone
M = Moon Stone

Here's the Pokémon to use the stones on:

Pikachu + T = Raichu
Eevee + W = Vapereon
Eevee + T = Jolteon
Eevee + F = Flareon
Clefairy + M = Clefable
Nidorina + M = Nidoqueen
Nidorino + M = Nidoking
Gloom + L = Vileplume
Growlithe + F = Arcanine
Jigglypuff + M = Wigglytuff
Vulpix + F = Ninetails
Weepinbell + L = Victreebell
Poliwhirl + W = Poliwrath
Exeggcute + L = Exeggutor
Shellder + W = Cloyster
Staryu + W = Starmie

Trading Evolution:
Some Pokémon won't evolve until you trade them. Here's the list:

Machoke evolves into Machamp
Kadabra evolves into Alakazam
Graveler evolves into Golem
Hauter evolves into Gengar