Aaahh!!! Real Monsters (1994)

S3E20 Bad Hair Day

After Krumm's pit hairs are accidentally removed during a prank on "Monster Mischief Day," Ickis pledges to help him regain his lost hair. While scouring the dump, Ickis discovers a hidden supply of "Super Grow" hair tonic and decides to apply it to Krumm’s pits. However, the outcome is far from what he expected, leading to chaotic consequences.