Mario and Luigi have found and combined two power ups, the Elephant Fruit and an enhanced version of the Cape Feather called the Super Cape Feather, so not only are they elephants, they are superheroes.

This was done by my good friend Sammy who did it for me as an early Christmas gift, you can find her here
https://www.furaffinity.net/user/sammydgator84
https://sammychan816.deviantart.com/

Alt: https://www.weasyl.com/~davidcaldwell1993/submissions/2333643/super-elephant-mario-bros-original

Mario and Luigi © Nintendo