- Extract your save with a homebrew (JK's Save Manager or other)
- Open mf1, edit
- Re-import your save with a homebrew (JK's Save Manager or other)
- Edit Mario Party Points
- Unlock all collectibles, boards and characters
- Edit Minigames won
- Edit Streetpass wins
https://github.com/Brionjv/Mario-Party-IT-Save-Editor/releases
https://gbatemp.net/threads/release-mario-party-it-save-editor.409916/