A robot toilet is sent from the future (by future Eleanor) to stop the butt who destroyed the Earth. The Flushinator must stop Deuce. Zack tries to protect his pal and convinces the robot to spend a day with Deuce first to see how great he is. It naturally blows up in their face and Deuce sends the Flushinator right into the cheeks of the Great White Butt, setting the terrible future into motion. / Zack has become allergic to of all things – Deuce. The doctor puts Deuce in a sterile bubble so that the two guys can remain best pals.