Get all 151 Pokémon in the hall of fame.

Pika Cup: Pokémon can only be between level 15-20.
 

Petit Cup: Level ranges between 25-30. There is a height requirement though. Height
6'8" limit and weight 44 pounds.
 

Poké Cup: Only can use 3 Pokémon, levels 50-55. The sum of the
Pokémon's levels cannot exceed 155.
 

Prime Cup: Everything is legal. You can have any level, height, weight, or number of
Pokémon. However, your opponents' levels are always 100.
 

If you use an attack that you know will kill the opposing Pokémon, but will hit you
with the recoil, make sure that your Pokémon has at least 20 HP left. Use the
attack and you will not suffer the recoil damage.

Successfully complete the game to unlock a much harder version of the Stadium, Gym Leader
Castle, and Mewtwo Battle modes.

This trick requires a Game Boy Game Shark and Pokémon Yellow. First start
the game and enable the Game Shark code to catch Mew. Put it first in your line-up, then
save the game. Go to the Game Shark screen and enable the code for the first
Pokémon in your line-up to be any desired Pokémon. Check your stats and it
should display your selected Pokémon's picture, but with Mew's name and
information. Save the game. Place the game in the transfer pak and go to the
Pokémon Stadium building. When prompted to select Pokémon, choose the one
that was Mew. When you start the match, the Pokémon will be Mew.

Put a box on the game, then put the Pokémon from a different game or the same one
in the box. Then, go back to the lab and put the box back on the game that you are trading
to, go to the box, and withdraw the Pokémon when you want or need it. Note:
This also works with items.

Successfully complete the Gym Leader Castle. Then when you want to complete it again, go
to the Gym Leader Castle, go directly to the Elite 4, and defeat your rival.

Get a Raichu that knows SURF (as seen by Surge's Raichu). It will put its tail under
itself and use it as a surfboard.

Upload Pikachu from the yellow version of the game to Pokémon Stadium. When
battling, Pikachu will say its name and have different motions for certain moves.
Note: You must go to battle for this to work. Do not register Pikachu.

Successfully complete the game.

Note: This trick requires the Mega Memory Card from InterAct. Save your file on the
Mega Memory Card. Go to the Pokémon Lab and put the Pokémon to be duplicated
in a 64 Box. Reload your game on the Mega Memory Card and receive your Pokémon in
the 64 Box. Repeat as many times as desired to create an unlimited number of the same
Pokémon.

Successfully complete the entire Poké Cup to get a sticker on the GB Tower. This
will allow you play Pokémon on the Nintendo 64 twice as fast. If you beat the
Masterball in the Prime Cup, a "Superfast" setting will be unlocked in the GB Tower. The
title will change to "Doduo GB Tower". Press C-Left to activate it. -From:
Viper5806@aol.com