The folder is usually called infinitefusion in the game’s save path, and some sources also mention a related Pokémon Infinite Fusion save folder name on Windows. The specific save file inside it is typically game.rxdata.

Where it usually appears

  • Windows save location has been reported under AppData\Roaming\infinitefusion.
  • The save file inside that folder is commonly game.rxdata.

Practical note

  • If you’re looking for the game install folder, that is separate from the save folder. One guide notes the install folder may include a shortcut labeled save file that opens the save location rather than storing saves directly in the game folder.

TL;DR

The folder is most likely infinitefusion , and the save file you want is game.rxdata.