GCN MemCard Recover does not currently have any save file definitions for Harvest Moon.
What you can do:
- Do a full backup of the memory card using GCMM.
- Create a new Harvest Moon save file.
- Back up only that save file in GCI format using GCMM.
- Send me the original raw backup and the new GCI file.
Depending on how much data has been written since the card was reformatted, it may be possible to recover the save file.