Hamster and Churro switch bodies just as a bodybuilder villain attacks.
Plot[]
Scientist Doug uses a newly created remote to swap bodies with his pet pigeon as part of an experiment to experience flight. However, this results in his pigeon running amok and the loss of his remote. Kevin and Gretel later discover the remote, only for Churro to make off with it; he then swaps bodies with Hamster after the latter attempts to retrieve it from the former. Unable to contact Doug, Kevin and Gretel are left with hiding Hamster and Churro's current state from Dave and Carolina. As a further complication, Dave takes "Churro" to a dog park while Gretel must stop bodybuilder Burt from his rampage at the gym.
Despite her best efforts, Gretel is unable to defeat Burt while Hamster gets into a fight with other dogs. Kevin then has Gretel lure Burt to the dog park in order to allow Hamster to assist her in the battle. While this results in Burt's defeat, a tree he threw into the air threatens Dave and Kevin. Overwhelmed with emotion, Gretel unleashes a new superpower that obliterates the tree. Afterwards, Doug calls back and is able to explain how to reverse the body swap.