(often referred to by its original project name, Super Fanmade Mario Bros. or SFMB) is a massive, fan-developed level creation tool for PC that many enthusiasts consider the unofficial "Mario Maker 3". Developed by neoarc , this ambitious project aims to include almost every 2D Mario style imaginable, alongside crossover themes like Sonic and unique custom art.

: Use specialized items like magnets, trampolines, and various shell helmets (Spiny/Buzzy Beetle) for complex level mechanics. Public Demo Features Demo Stage World

As of , the first legitimate public demo was released. This version, sometimes called " Mario Singleverse ," allows players to: