SpongeBob SquarePants - Season 7 - Eps 7: Goo Goo Gas
Plankton's latest scheme sees him invent a gas that causes people to turn into babies. Plankton hijacks the Krusty Krab and turns all the customers into babies. Plankton then gets the secret formula, but SpongeBob accidentally overpowers the gas canister by bashing it, causing it to explode. The gas turns Plankton into a microscopic baby.
About SpongeBob SquarePants

Title: SpongeBob SquarePants
First Air Date: 1999-05-01
Last Air Date: 2025-03-14
Status: Returning Series
Rating: 7.7/10 (from 3004 votes)
Language: EN
Seasons: 16
Total Episodes: 608
Network: Nickelodeon
Genres: Animation, Comedy, Family
Production Companies: United Plankton Pictures, Nickelodeon Productions, Nickelodeon Animation Studio
Synopsis
Deep down in the Pacific Ocean in the subterranean city of Bikini Bottom lives a square yellow sponge named SpongeBob SquarePants. SpongeBob lives in a pineapple with his pet snail, Gary, loves his job as a fry cook at the Krusty Krab, and has a knack for getting into all kinds of trouble without really trying. When he's not getting on the nerves of his cranky next door neighbor Squidward, SpongeBob can usually be found smack in the middle of all sorts of strange situations with his best buddy, the simple yet lovable starfish, Patrick, or his thrill-seeking surfer-girl squirrel pal, Sandy Cheeks.
Cast

Tom Kenny
SpongeBob SquarePants (voice)

Bill Fagerbakke
Patrick Star (voice)

Rodger Bumpass
Squidward (voice)

Clancy Brown
Mr. Krabs (voice)

Carolyn Lawrence
Sandy Cheeks (voice)

Mary Jo Catlett
Mrs. Puff (voice)

Mr. Lawrence
Plankton / Larry the Lobster (voice)