Unlimited items:
Pause the game while playing and hold Select until a blinking line appears. Then hold A + B and press Left or Right to select an item. Press Up or Down to change the numner of items.
Different ending:
If you dont wake Wario at the beginning, he will be taken by pirates to a bonus level. When you finish the game you will get a different ending.
In-game reset:
Press Select + Start + A + B while playing.
Easy to move on conveyor belts:
If you carry an opponent while walking over the conveyor belts, you will not be pushed by it.
Bonus Mini-game:
Beat the game with 100% and all treasure and map pieces to get a bonus game after the final level.
The Genie has more
Wario Land 2 Cheats at CheatingDome.com.