Read this boss Super Mario 64 Switch (3D All Stars) guide to know if there is co op / multiplayer online! Includes how to co op / multiplayer, split screen mode, and more.
Is There Co Op / Multiplayer Online?
No Co Op / Multiplayer
In the Super Mario 64 game (3D All Star), there was no co op mode or online multiplayer. The gameplay was only single player throughout all levels / stages.
CoOp / Multiplayer In Previous Game
Mod Was Needed To Play Multiplayer
Fans of the game implemented a game mod that allowed multiplayer mode via split screen or online. However, this mod was not officially created by Nintendo.