Super Sheffy Bros. 3 is a challenging ROM hack of Super Mario Bros. 3. Described by the author as a "kaizo romhack", it features 16 levels of challenging platforming with little of the trial-and-error gameplay that is common in many kaizo hacks. These levels require using various powerups and making shell jumps and even wall jumps in order to complete them.
For this run, Mizumaririn opts to complete all 16 levels of the romhack, including the optional ones, as fast as possible.