101Leafy researched the games.
BlackDragonGunlance

Said to be cursed and used for evil. A frightening sight. Shelling Lv3
| Class | Gunlance |
|---|---|
| Rarity | 8 |
| Attack | 460 |
| Dragon | 310 |
| Affinity | -20% |
| Slots | 0 |
| Price | 100,000z |
Upgrades
| Upgraded from | Black Smoke Gunlance |
|---|---|
| Upgrades into | TrueBlkDrgnGunlance |
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 760.