Wario Land 2 Cheats (GameBoy)

In "defeat the giant snake" let the snake eat you and when you get thrown to the top go in
the door to your left. When your through that door smash the top right part of the wall
beside you and go 
  to the next door you see. Then roll down the stairs and keep rolling untill you bounce
off of a wall. Then go in the door with stars over it. Now your in a new hidden chapter.

To prevent yourself from moving on a conveyor belt, carry an enemy. As long as you're
doing this you'll move normally.

Complete the game with 100% Stage Clear, Treasure, and Map Pieces and you will get the
final stage and a bonus game, Flagman D.D.

Successfully complete the game with a 100% status with all treasure and map pieces.
Then the levels on the map that have a Boss at the end will have a skull nearby, marked
with an arrow. Choose one of these levels. Then at the level name screen, hold Down and
press A. The game will proceed directly to the Boss.

Game Shark Codes

Note: You must have a 2.1 or higher version of the Game Shark
to use these codes in a Game Boy Color system.

To find the first secret chapter in Wario Land 2, enter the first level. Don't wake Wario
up, and the Gooms will kick Wario out of his house. The story will then proceed along a
different path.

If you're stuck or just want to reset, press Select, Start, A and B all at the same time.
You'll have to start over from your last save point, but you won't lose coins or items.

Successfully complete the game with a 100% status with all treasure and map pieces. Then a
bonus game can be played after the final level.