XXXX Super Mario Brothers

Created by a Japanese ROM hacker who calls himself “79”, XXXX is a hack from 2003 that has a lot of replay value. Pseudo-randomization of several gameplay elements and highly skilled level layout make this game harder than even the Japanese SMB2, even though it’s technically much shorter.

The game borrows several elements from SMB2J, such as Poison Mushrooms and Luigi’s unique physics, as well as the differing bounce height when stomping enemies in certain ways.