Mario's Mystery Meat

Mario's Mystery Meat is a Super Mario World ROM hack created by Eminus dedicated to all of Vinesauce Vinny's streams and the in-jokes that have resulted from them. The fangame features Sponge, the third forgotten "Mario Brother" as the main protagonist, who has to find meat for Mario and Luigi, leading to a series of abstract worlds and locations based on previous Vinesauce streams. The game features new audio, abilities, and more, and is not designed to be ran on existing SNES hardware.

Mario and Luigi seem to keep needing meat for their spaghetti. Because they're busy saving the world, Sponge is tasked to go out and find meat.