101Leafy researched the games.
War Basher

A War Hammer with ludicrous power. Shatters wyvern craniums like egg shells.
| Class | Hammer |
|---|---|
| Rarity | 7 |
| Attack | 1144 |
| Defense | +8 |
| Slots | 2 |
| Price | 75,000z |
Upgrades
| Upgraded from | War Stamp |
|---|
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.