Remember Super Mario 2? It was that Mario game is entirely unrecognizable from any other Mario game. This is actually because it wasn’t originally a Mario game.
Released in 1988, Super Mario 2 is actually a clone of an earlier Japanese title called Doki Doki Panic. It is likely that Nintendo’s market testing in the United States proved the Japanese version of Super Mario 2 was too much like the original, so they re-sprited another title with Mario characters and put the Mario 2 title on it.