Cheat Mode:

First type yoyoyo

aofreoio    -grants access to all bonus levels.
eatee       -beast morphing off
ehrtrr      -toggles flying off also in bonus levels
erhne       -fight all opponets
erhyhrly    -weakens toed men
ithfo       -activates 2 out of 3 bouts
oaoaeioa    -engages auto flying in lab
ofovh       -bobles time in bonus levels
oivnnfof    -activates tadpole atacks in lab 
orufo       -god mode in bonus rooms.      

Thanks to Revolution reader james cameron!