For digital users looking to manage storage, the file format you choose matters. While the game has a surprisingly small base size of roughly NSP (Nintendo Submission Package):

Disclaimer: This article is for educational purposes regarding file formats and backup management. Always own a legitimate copy of the game before creating or managing digital backups. Piracy is illegal and harms developers like Nintendo.

Look for releases from trusted scene groups. For this title, the "Best" release is often found labeled with or Repack , as early dumps had a bug where the Cat Suit would not render correctly in Multiplayer.