101Leafy researched the games.
Iron Striker

Enormous Hammer made from a solid lump of iron. Incredible power.
| Class | Hammer |
|---|---|
| Rarity | 2 |
| Attack | 624 |
| Slots | 0 |
| Price | 2,150z |
Upgrades
| Upgraded from | War Mace |
|---|---|
| Upgrades into | Iron Striker+, Gunhammer Prototype |
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 718.
Materials
Earth Crystal ×10, Iron Ore ×20, Disk Stone ×20