Any way to add it to Genesis collection? I try to scan the file but it does nothing with this game.
The scanner won’t find it because it relies on a database of officially released games. It won’t add hacks or homebrew games. Search for RetroArch playlist creation tools to manually add things to your collection.
Personally I’ve always just used the “Load Content” feature in the main menu whenever I came across a game that couldn’t be scanned into my collection.
You always can manually add a entry on Core Playlist. It works.