101Leafy researched the games.
Great Demon Hammer

Before the Hammer was embraced by all, this one was loved by a single elder.
| Class | Hammer |
|---|---|
| Rarity | 6 |
| Attack | 1040 |
| Affinity | 10% |
| Slots | 1 |
| Price | 35,000z |
Upgrades
| Upgraded from | Iron Devil |
|---|---|
| Upgrades into | Devil Masher, Iron Impact |
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 720.