There's a Battle of the Bands on at Beanotown Hall, and Dennis and co have their eyes on the prize - a fancy new drum kit. There's only one problem: they need an adult in their band to qualify for the competition... Dennis needs a grown-up Dinmaker, fast! In desperation, the Dinmakers recruit a highly unusual fan - an ape that has escaped from the local zoo - and sneak him into the competition disguised as a long-lost uncle. Will they get away with it, or will Walter and the Wailers make off with the prize? Show less