101Leafy researched the games.
Wailing Cleaver Shin

Sword of regret and hope. A swordsman drunk on power, felled by a disciple.
| Class | Long Sword |
|---|---|
| Rarity | 10 |
| Attack | 1200 |
| Thunder | 560 |
| Slots | 1 |
| Price | 120,000z |
Upgrades
| Upgraded from | Wailing Cleaver |
|---|
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 692.