I Was a Teenage Gary SpongeBob SquarePants : Season 1 Episode 27

TV-Y7 Nickelodeon 23m int(0)

Aired: October 28th, 1999 @ 5:00 PM EST on Nickelodeon

Gary becomes sick when Squidward forgets to feed him, so a doctor has to come and give Gary some medicine. The doctor has Squidward give Gary the shot. Squidward accidentally gives the medicine to Spongebob instead of Gary, which turns Spongebob into a snail.