101Leafy researched the games.
Jail Hammer

Uses Thunderbugs to stun monsters and render them paralyzed.
| Class | Hammer |
|---|---|
| Rarity | 3 |
| Attack | 624 |
| Paralysis | 190 |
| Slots | 1 |
| Price | 3,100z |
Upgrades
| Upgraded from | Atlas Hammer |
|---|---|
| Upgrades into | Binder Mace |
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 724.