101Leafy researched the games.
Basarios Venom Spear

Large Spear made from poisonous Basarios. Injects venom into enemies.
| Class | Lance |
|---|---|
| Rarity | 4 |
| Attack | 322 |
| Poison | 200 |
| Slots | 0 |
| Table price | 4,250z |
Upgrades
| Upgraded from | Venom Lance |
|---|---|
| Upgrades into | Gravios Spear, Black Gravios Spear |
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 748.