Fight Like a Caveman

When Phinebunk accidentally enrages the toughest caveman in the tribe, Boofgard, he challenges Phinebunk to a dominance display. His friends try to train him but Phinebunk knows he doesn't have a fighting chance, so he and Gerb make a game of logic and strategy which looks like a giant version of checkers. Bunga gets a call to stop Doofengung from making a montain out of a molehill... by digging it.