Viewtiful Joe Double Trouble Codes -

V-Rated mode:
Successfully complete single player mode under the Adults difficulty setting.

Finish flip in Normal mode:
When your VFX bar's first container is half full, use Slow Motion (hold L) and double jump. If timed correctly, you will do half the flip in Hero mode and half in Normal mode. If you want it to look even better, use Slow Motion and Double Jump just as Joe transforms into Hero mode. If timed correctly you will do your flip with the transformation glow around you.