SpongeBob SquarePants is a cartoon character and the main protagonist of the hit Nickelodeon show named after him. In SMG4, he makes cameos in a few videos.
In Nickelodeon canon, SpongeBob is confident and optimistic, but also naive sea sponge, he loves his job at the Krusty Krab and acts kind yet rather obnoxious to others, but is helpful and kind to everyone in need, ever if they are aggressive and are sometimes annoyed by him.
SMG4: Mario's Magical TV features "SpongeBob SquarePants Corrupted", which is a segment involving SpongeBob and friends in a messed-up version of Bikini Bottom acting incredibly odd.
- R64: Stupid Mario Maker
- ♫ The Ultimate Smash Bros ♫
- R64: Mario's Boat Trip
- SMG4: MarioTube 2
- SMG4: The Movie Audition
- SMG4: Super Challenge 64
- SMG4: 3 MILLION SUB FAN COLLABORATION!
- SMG4: A Day In The Life Of Everyone
- SMG4: Mario's Magical TV
- SMG4: The Demon Among Us
- SMG4: Mario Gets【Ｗｏｋｅ】
- SMG4: Stupid Bowser's Fury
- SMG4: Into the Dark Web
- SMG4: WHAT IF...?
- Mario Plays: Friday Night Funkin
- He's born on May 1, 1999.
- He is ambidextrous.
- A replica created by Axol appears SMG4: A Day In The Life Of Everyone and in a flashback in SMG4: The Demon Among Us.