101Leafy researched the games.
Volcano Gunlance

Based on research of the Lavasioth. This really fires liquid lava! Shelling Lv3
| Class | Gunlance |
|---|---|
| Rarity | 9 |
| Attack | 598 |
| Fire | 200 |
| Slots | 2 |
| Price | 100,000z |
Upgrades
| Upgraded from | Sea King Gunlance |
|---|---|
| Upgrades into | Lavasioth Gunlance |
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 758.
Materials
ThckLavasiothScl ×8, HvyLavasiothShl ×6, HvyLavasiothFang ×3, Wyvern Stone ×2