A man nicknamed trollgames found a secret level in Super Shmario Revenger 2. The Lost Levels, on which there are several corpses of Toads, and at the end of the room there is a black and white creature, a likely killer. If you touch it, Shmario dies.

did you know that nintendo canonized shmario... back in 1987?

Super Shmario Revenger. 3
https://www.youtube.com/watch?v=BquboprWPE4

ALL SECRET WORLDS IN SUPER SHMARIO REVENGER ORIGINS
https://www.youtube.com/watch?v=RceBCTAajsY

evolution of shmario