Quality - Sonicknuckleswsonic3bin Extra

No-Intro is a preservation group that catalogs ROMs by removing bad dumps, overdumps, and hacks. For Sega Genesis, the gold standard is the No-Intro Sega - Mega Drive/Genesis set.

The exact files you need:

Many users search for a single Sonic 3 and Knuckles.bin. However, these are often fan-patched or have broken lock-on logic. To achieve true extra quality, you should emulate the lock-on process via your emulator. sonicknuckleswsonic3bin extra quality

If you want improved visuals/audio for Sonic 3 & Knuckles, look for: No-Intro is a preservation group that catalogs ROMs