In this hack you will find:
-Sonic as a playable character
-Knuckles as player 2
-Altered text to resemble Sonic Adventures
-Altered Graphics to resemble Sonic CD
-The song "Bad Apple" with different styles to replace the vanilla music.
-Added "256" world mode after beating the game initially.
Database match: Super Mario Bros. (World)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
File CRC32: 3337EC46
ROM SHA-1: FACEE9C577A5262DBE33AC4930BB0B58C8C037F7
ROM CRC32: D445F698