This is not a retail ROM. It is a patch applied to a standard Super Mario 64 (USA) ROM. You will find the patch file (usually .bps or .xdelta ) on ROM hacking forums like Romhacking.net or Kaze’s Discord server. You must provide your own legal ROM to patch it.
Set your video plugin to GlideN64 for accurate lighting and texture rendering. Step-by-Step Installation Guide super mario galaxy 64 rom download better