101Leafy researched the games.
Volcanic Rock

Blue Hunting Horn made of heavy Basarios materials with a sob-inducing tone.
| Class | Hunting Horn |
|---|---|
| Rarity | 7 |
| Attack | 988 |
| Fire | 320 |
| Slots | 2 |
| Price | 40,000z |
Upgrades
| Upgraded from | Basarios Rock Mk.II |
|---|---|
| Upgrades into | Volcanic Gig |
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 734.