101Leafy researched the games.
Venomous Cologne

Gunlance's poison reserve auto-releases a mist while sharpening. Shelling Lv2
| Class | Gunlance |
|---|---|
| Rarity | 8 |
| Attack | 483 |
| Poison | 160 |
| Slots | 1 |
| Price | 90,000z |
Upgrades
| Upgraded from | Big Slugger |
|---|---|
| Upgrades into | Venomous Attar |
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 756.
Materials
Chameleos Hide+ ×5, Novacrystal ×5, Chameleos Spike ×2, Firecell Stone ×5