Rocky & Bullwinkle will fly through the levels with this code.
To activate, start a game and press B, A, A, Start, A, B, B, A on Controller Two.
To warp to another level while playing, press B on Controller Two.
Note: If you use this code you'll be invincible but you can't jump.
You'll get to preview the later stages but won't be able to play them properly.