This patch makes the improvement to Super Mario Bros. where the Goombas do not just fall off of edges, which making it hard to create levels with limited enemies that actual go both ways. Sick of having limited enemies to use the "both way" ability in SMB Utility? This is for you.
Super Mario Bros. (World).nes
CRC32: 3337EC46
MD5: 811B027EAF99C2DEF7B933C5208636DE
SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922