101Leafy researched the games.
Gravios Venom Spear

Lance crowned with the name Gravios. One false step and you may befall its venom.
| Class | Lance |
|---|---|
| Rarity | 7 |
| Attack | 437 |
| Poison | 270 |
| Defense | +6 |
| Slots | 0 |
| Table price | 70,000z |
Upgrades
| Upgraded from | Gravios Spear |
|---|---|
| Upgrades into | Gravios Lance |
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.