Which Wii is GameCube compatible?
Yes and no. The original Wii fully supports GameCube discs and controllers. However, the later updated “Wii Family Edition” (model number RVL-101) dropped support for the GameCube entirely. Additionally, the redesigned Wii Mini isn’t backward compatible with GameCube games or accessories either.
No they don’t like GC the Wii has its own plug, that won’t work with anything else. Before the Gamecube all Nintendo cables from Snes through N64 work with each other.