Teenage Mutant Ninja Turtles (1987): Season 6, Episode 4

6 - 4: Adventures in Turtle-Sitting

Michelangelo accidentally turns his brothers into five-year-olds with Donatello's "Food Rebibifier"(a machine that turns old and rotten food fresh again), while Shredder, Rocksteady, and Bebop steal weather balloons and helium tanks.