redhotsonic: up, up, down, down, left, left, right, right on the title screen
Metal Sonic: Hold "B" and press start while holding "B".
Download link:
Download ROM (without Steam): https://www.youtube.com/watch?v=hia7MTyhJ2Y&t=0s
Download ROM (with Steam): https://steamcommunity.com/sharedfiles/filedetails/?id=1639786390
#sonic1hacks
