Random stage warp
As soon as you start (the very beginning when Bullwinkle is standing in front of the building), press B, A, A, Start, A, B, B, A on Controller 2. Start the game, and whenever you press B on Controller 2 you will warp to a random stage. This code will not let you finish the game or even jump, but you will be invincible and it will allow you to walk through and preview later stages.
As soon as you start (the very beginning when Bullwinkle is standing in front of the building), press B, A, A, Start, A, B, B, A on Controller 2. Start the game, and whenever you press B on Controller 2 you will warp to a random stage. This code will not let you finish the game or even jump, but you will be invincible and it will allow you to walk through and preview later stages.