101Leafy researched the games.
Juggernaut

Super-destructive metallic Hammer. Once in motion, not even a horde can stop it.
| Class | Hammer |
|---|---|
| Rarity | 9 |
| Attack | 1404 |
| Defense | +10 |
| Slots | 2 |
| Price | 100,000z |
Upgrades
| Upgraded from | Blacksmith |
|---|
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.