101Leafy researched the games.
Hidden Stinger

Lance of the blackest night. Wielder's murderous intent soon finds release in prey.
| Class | Lance |
|---|---|
| Rarity | 7 |
| Attack | 437 |
| Affinity | 40% |
| Slots | 1 |
| Price | 80,000z |
Upgrades
| Upgraded from | Tiger Stinger |
|---|---|
| Upgrades into | Black Rain Darklance |
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 752.
Materials
Nargacuga Tail ×3, NargaCuttingWing ×5, Nargacuga Fang+ ×10, Narga Brain Stem ×1