101Leafy researched the games.
Ultra Kut-Ku Cannon

A giant, high powered weapon with incredible Attack. Difficult to handle.
| Class | Heavy Bowgun |
|---|---|
| Rarity | 9 |
| Attack | 372 |
| Affinity | 10% |
| Defense | +14 |
| Slots | 0 |
| Reload | Slow |
| Recoil | Medium |
| Table price | 9,000z |
Listed in the equipment tables of 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 789.
Ammo
| Item | Load |
|---|---|
| Normal S Lv1 | 9 |
| Normal S Lv2 | 9 |
| Normal S Lv3 | 12 |
| Pierce S Lv2 | 3 |
| Pellet S Lv2 | 4 |
| Crag S Lv2 | 1 |
| Clust S Lv2 | 1 |
| Flaming S | 4 |
| Poison S Lv1 | 3 |
| Poison S Lv2 | 1 |
| Tranq S | 2 |
| Paint S | 2 |
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 789.
Materials
HvyBlueKut-KuShl ×6, Lucky Kut-Ku Ear ×3, Hypno Claw+ ×5, Hvy Monster Bone ×2