Here's everything you need to know about the Retro-Bit Legacy GC before you buy one for yourself!
Retro-Bit Sega Genesis 6 Button Arcade Pad Review & Comparison - Sega Genesis - AtariAge Forums
Retro-Bit Wireless Legacy 16 Reviewed on Super Nt and Nintendo Switch
Retro-bit Tribute64 2.4GHz Wireless Controller Review (Hardware) - Official GBAtemp Review
Retro Gamer No. 134 (Digital)
Sega Genesis/Mega Drive
RetroFighters BattlerGC and Brawler64 Controllers Review (Hardware) - Official GBAtemp Review
For anyone that is wondering the OEM button membranes fit into the Retrobit Legacy GC with a little bit of trimming : r/Gamecube
Best Gift Ideas For Retro Gamers In 2023 - GameSpot
Review: Retro-Bit LegacyGC - Perfect For Game Boy-Loving GameCube Fans
Retro-Bit Prism HD Adapter Review — GameTyrant