101Leafy researched the games.
Hard Hitter

Giant poison Gunlance mixes flexible hide with high quality ore. Shelling Lv3
| Class | Gunlance |
|---|---|
| Rarity | 6 |
| Attack | 437 |
| Poison | 290 |
| Slots | 1 |
| Price | 35,000z |
Upgrades
| Upgraded from | Grand Slam |
|---|---|
| Upgrades into | Big Slugger |
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.