Captain Underpants and the Prehistoric Punch of the Plotting Plunger

This book is about Captain Underpants and it is book 13. It is about a clone of the Robo Plunger attacking the heroes. George and Harold must put Ook, Gluk, Diaper Baby, Diaper Dog,and Dog Man comic books on the PATSY 2000, hoping 8 heroes is enough to take on a robotic plunger.....