101Leafy researched the games.
Cat's King

Sword with a face. Said to hold the soul of a Felyne who defended its master.
| Class | Great Sword |
|---|---|
| Rarity | 6 |
| Attack | 720 |
| Paralysis | 450 |
| Slots | 1 |
| Price | 45,000z |
Upgrades
| Upgraded from | Cat's Curse |
|---|---|
| Upgrades into | Cat of Venus |
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.