I read from page 123-136
This is what happened.
Captain Underpants and Captain Blunderants was going to have a fight when George clicked his fingers and evil Captain Blunderpants turned into the nice Principal named Mr.Krupp.Then Harold quickly gets ropes and tied up Evil George,Evil Harold and Nice Mr.Krupp.Then Harold says "all we have to do is de-hypnotise Zulu",which was their pet Hamster who got hypnotised from Evil George and Evil Harold.So George said "you shouldn't say things like that" said George and Harold said "why?" Then Lightning strikes and Thunder rumbles and it starts to rain then George and Harold were sad because when ever water drops on Captain Blunderpants head he will turn back into evil Captain Blunderpants and Captain Underpants will turn back into Evil Mr.Krupp.So George and Harold hops on their pet Pterodactyl and rides off while Captain Blunderpants grabs Evil George and Evil Harold and fly's off after George and Harold.
TO BE CONTINUED.