Unlock GB Tower Secrets:
To get your Gameboy games to play at a
higher speed at Game Boy Tower, defeat either Gym Leader Castle or all
Stadium Cups in Round One. This will give you the Doduo sticker for GB
Tower, allowing you to play Gold and Silver at double speed. If you beat
the Castle or Stadium Cups in Round Two, the Dodrio GB Tower will be
unlocked, allowing you to play the Gameboy games at Hyper Speed.
Get Rare Pokemon:
Beating the Rival Cup the first time will yield a rare Farfetch'd Pokemon
with Baton Pass. The second time you beat the Rival Cup (Round 2),
you'll be granted a Gligar with the Earthquake move.
Harder Mini-Games
Challenge your computer opponents to a Hard seven-coin Mini-Game
battle. If you win, another difficulty level will be unlocked: Super
Hard.