Super Mario 64 Multiplayer but SMG4 is player 2 (and SMG3)
SMG4 and SMG3 remodels ported to Mario 64 by Warioplier.
SMG4 and SMG3's N64 models made by Guillaume Coquel Danchin and sm64rise.
This was made by patching the .bps SMG4/3 file to a ROM of SM64 Multiplayer Dynamic