101Leafy researched the games.
Silver Rook

Gunlance covered with Silver Rathalos scales. Exudes high-class. Shelling Lv3
| Class | Gunlance |
|---|---|
| Rarity | 7 |
| Attack | 414 |
| Dragon | 250 |
| Slots | 2 |
| Price | 65,000z |
Upgrades
| Upgraded from | Imperial Gunlance |
|---|---|
| Upgrades into | Gun Chariot |
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.