Lawn Gone Johnny/Johnny's Ultimate Treehouse

S5 E8: Johnny's simple chore turns into an all-out, souped up lawnmower race with his sisters, the agents, Dark Vegan, Mittens, and Brain Freezer. Loser mows the winner's lawn - forever! / Johnny wants to prove to Sissy he has the cooler treehouse so 'borrows' some his sisters' building clones to create the hippest teen hangout, only to find it's too popular.