101Leafy researched the games.
Kut-Ku Stave II

Fire breathing hunting Bow made from Yian Kut-Ku. Said to be user friendly.
A bow that hunters who have taken down many Yian Kut-Ku with the Hunter's Bow often make as their next step. The counterweight on its center, which recalls a Yian Kut-Ku's beak, is one of many touches that show the workshop craftsmen's playful side.
Our translation of 復刻 ハンター大全 (KADOKAWA / Enterbrain, 2014), page 175.
| Class | Bow |
|---|---|
| Rarity | 3 |
| Attack | 144 |
| Fire | 100 |
| Slots | 1 |
| Table price | 2,300z |
Upgrades
| Upgraded from | Kut-Ku Stave I |
|---|---|
| Upgrades into | Kut-Ku Stave III |
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 796.