Dennis gets into a fluffy mess when he runs into Von Screwtop's hadron collider with the professor's pet hamster, Galahad. To stop Dennis from completely changing into a hamster, the gang must sneak him into Wilbur's lab to use his reverse hadron collider and change him back!

Mayor Wilbur passes a law to increase the healthy eating in Beanotown, replacing all foods with peas...of the mushy variety! The gang must avoid the people of Beanotown who are rapidly turning into Zompeas after eating the green mush. Dennis uses the only ordinary peas in town to sabotage Wilbur's mush making factory and save the day!