101Leafy researched the games.
Cat's Soul

Sword with a face. Said to hold the soul of a Felyne who defended its master.
| Class | Great Sword |
|---|---|
| Rarity | 3 |
| Attack | 480 |
| Paralysis | 200 |
| Slots | 1 |
| Price | 2,150z |
Upgrades
| Upgraded from | Buster Blade |
|---|---|
| Upgrades into | Cat's Curse |
Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 684.