101Leafy researched the games.
Black Bow II

Darker than a bottomless pit, prey cannot escape the arrows this Bow fires.
| Class | Bow |
|---|---|
| Rarity | 8 |
| Attack | 192 |
| Dragon | 120 |
| Slots | 1 |
| Price | 15,000z |
Upgrades
| Upgraded from | Black Bow I |
|---|---|
| Upgrades into | Exterminator Bow I, Glorious Victory I |
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 802.