Captain Underpants Revolting Revenge of the Radioactive Roboboxers by Dav Pilkey

In the fist part george and harold made a hpyno ring and hypnotised mr.krupp into captain underpants and at first it was very funny and in the end he stayed as captain unedrpants when they poured water on him and always jumps out the window and starts to look for crime and did and in this novel george and harold turned into giant zombie nerds and also professseer poopypants found a new evil plan to make a giant underwear on pants and the future captain undeerpants/mr.krupp and george and harold then when they snap there fingers he also turns into captain underpants and melven builded something that is a giant octupus that can walk and in the ending water was poured on captain underpants and turned back into mr.krupp and when someone snaps there fingers mr.krupp turns back onto captain underpants.