Enter these cheats under secrets after pausing:

Wish - Code

Big heads - EINSTEINIUM
Destroys everything in surroundings - SMARTBOMB
Eye lasers - GAZERBEAM
Fire trail - ATHLETESFOOT
Infinite incredipower for Elastigirl - FLEXIBLE
Infinite incredipower for Mr. Incredible - SHOWTIME
One hit kills - KRONOS
Restore 25% health - UUDDLRLRBAS
Small heads - DEVOLVE
Speed up gameplay - SASSMODE
Battle mode unlocked - ROTAIDALG
Brightness/bright colors - EMODE
Credits sequence - YOURNAMEINLIGHTS
Deactivate all codes - THEDUDEABIDES
Fire trail - ATHLETESFOOT
Easier game - BOAPLACE
Temporary infinite incredi-power while playing as dash - DASHLIKES
Infinite incredi-power, Violet - TONYLOAF
Run Fast - DANIELTHEFLASH
Slow Motion - BWTHEMOVIE
Change Camera X - INVERTCAMERAX
Change Camera Y - INVERTCAMERAY
Toggle - BHUD HUD
Crazy Colors - DISCORULES
Play Intro - HI