Pokemon Stadium 2 was released by Nintendo on March 2001. This game features all first and second generation Pokemon which brings a total of 251 Pokemon. It also has options such as trainer, league, and multiplayer modes. Capture all the Pokemon you can and battle them out and get some help along the way with these Pokemon Stadium 2 cheats

Unlock GB Tower Secrets
You have to beat the Stadium Cups in Round One or all of the Gym Leader Castle in this game. You will then get the Doduo sticker for the GB Tower. This allows you access to the Gold and Silver at two times the speed. Now if you defeat the Castle or Stadium Cups in Round 2, you will unlock the Dodrio GB Tower. You will be rewarded by being allowed to play at Hyper Speed.

Fight Your Rival
If you defeat all of the Cups in Stadium Mode and every one of the trainers in Gym Leader Castle, you will unlock a special Rival Cup to battle against Mewtwo, Ho-oh and Lugia.

Get Rare Pokemon
Beati the Rival Cup – get Farfetch’d Pokemon with Baton Pass.
Beat the Rival Cup (Round 2) – get Gligar with the Earthquake move

Rent Celebi
To rent Celebi, you will have to get into Round 2 by defeating all of the Cups in Stadium Mode, beat all the trainers in Gym Leader Castle, and stop your rival. Once you open up Round 2, you will be able to rent Celebi.
Note: you can only rent Celebi in Prime Cup.

Unlock Amnesia Psyduck
Get 151 Pokemon (all of them) in the Pokemon Hall of Fame to unlock this rare Pokemon.