101Leafy researched the games.
Wild Power Bow I

Boasts great power. It can only be drawn by those with sufficient strength.
| Class | Bow |
|---|---|
| Rarity | 6 |
| Attack | 240 |
| Slots | 3 |
| Table price | 8,950z |
Upgrades
| Upgraded from | Wild Bow IV |
|---|---|
| Upgrades into | Wild Power Bow II |
Can also be made new at the smithy.
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.
Materials
Congalala Pelt+ ×6, Congalala Fang ×10, Giant Bone ×10, Carbalite Ore ×6