Enter one of the following codes at secrets menu:

HUDBEGONE - Disable HUD
FROZPROF - Frozone gets 1,000 experience pts.
FROZMASTER - Frozone has everything at max
FROZBOOM - Frozone's Super move
SHOWME - Unlock gallery
LEVELLOCKSMITH - Select stage
MRIPROF - Mr. Incredible gets 1,000 experience pts.
MRIMASTER - Mr. Incredible has everything at max
MRIBOOM - Mr. Incredible's Super move
WHYMUSTWEFIGHT - Unlimited energy