101Leafy researched the games.
Iron Gunlance+

A low-cost Gunlance with more than adequate ability. A good start. Shelling Lv1
| Class | Gunlance |
|---|---|
| Rarity | 2 |
| Attack | 253 |
| Slots | 1 |
| Price | 1,750z |
Upgrades
| Upgraded from | Iron Gunlance |
|---|---|
| Upgrades into | Steel Gunlance |
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.