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!

Dennis is desperate to prevent Pieface from failing Mrs Creecher's maths test! He persuades the gang to use Professor Von Screwtop's mind-swapping device. But in a disastrous turn of events, Screwtop is on the loose with the brain of Paul the potato and Pieface is left with a potato with the brain of Screwtop to help get him through the test!