Thanks to the efforts of the amazing N64 hackers who developed the "goldeneye setup editor", ownsoldier been able to put his very limited hacking skills to work to cook up this mod that recreates SONIC 1, 2, 3, and knuckles levels and music in SSB64. He reworked every possible level without causing the game to crash or glitch on emulator AND ON CONSOLE (Everdrive 64 version 3.0). That means that all model poly-counts, textures, and music are kept within their respective boundaries to keep the framerate and processing speed consistent with the original game, some stages have even slightly improved performance. ALL the custom music has been reworked BY HAND down to every instrument and every note.
This is a very cool mod that puts in multiple Sonic Stages and Music into Smash 64. This mod is made by "ownsoldier".