Super Bill Kill is a simultaneous 2-player version of Super Mario Bros. in which the second player can turn enemies into Bullet Bills and target them at Mario.
This ROM was originally designed for an offline tournament at AGDQ 2019. You can
https://www.youtube.com/watch?v=3hcl9NJiQ7Y&t=4s to see the ROM hack in action.
No-Intro Name: Super Mario Bros. (World)
(No-Intro version 20130731-235630)
File SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
ROM SHA-1: FACEE9C577A5262DBE33AC4930BB0B58C8C037F7
Patched File SHA-1: 31FDDED24FD50AC1580B7DBE9293839E04972EDB
Patched ROM SHA-1: CF204911F6B7133FEAF7736D9EA2F79098118FEC