Nickelodeon Fanonverse

The Nickelodeon Fanonverse is a term that makes up ToonWrecker Comics' line of Nickelodeon-related comic books, animated series and CD-ROMs.

Background
The first instance of this universe's existence is was featured in a Ren and Stimpy comic featured in the 54th issue of Tales of Nostalgia.

In the story, RegaRocked!, both Ren & Stimpy meet various Nicktoons, in a storyline all leading to a showdown against the titular RegaRock and his minions.

Later, in SpongeBob SquarePants #5, we learn that Bikini Bottom is connected to the Fanonverse in a battle against Plankton.

Book(s) connected:
CatDog

Ren & Stimpy: The New Adventures

Tales of Nostalgia

W.I.L.D.C.A.T.S & Doug: The Senseless Team-Up

Avatar: The Legend Continues

Daggett and Norbert: Right Back At 'Ya! (2018)

Advent of the Infinity Stones

SpongeBob SquarePants