Johnny uses his sisters' genetically altered rat for a school project, only to have it stolen by a desperate circus owner to save his failing show.

When Johnny is ordered by his school to go camping with his father, he uses his sisters' ray gun to turn Dukey into a monster to scare his father out of it, only to have Bigfoot fall in love with monster Dukey.

Johnny spends the night in a haunted house with Dukey and Jillian to win a ton of candy.

Johnny stays up half the night to watch a six-hour Halloween monster-movie marathon, then steals his sisters' dream machine (thinking it to be an alarm clock) so that he will be able to wake up in time for school the next day; however, he has nightmares during the night which the device brings to life.

Bling-Bling tries to get Susan once again, but his henchmen soon rebel against him by tying him up with Susan.

Johnny visits Reptoslicer and his family, but Reptoslicer then tries to eat Porkbelly.

When Earth Day approaches, Johnny is visited by three ghosts.