101Leafy researched the games.
Purse Bop+

Smelly Hammer covered in Khezu hide. It's best not to see what's inside the bag...
| Class | Hammer |
|---|---|
| Rarity | 9 |
| Attack | 1144 |
| Thunder | 220 |
| Slots | 0 |
| Price | 85,000z |
Upgrades
| Upgraded from | Purse Bop |
|---|---|
| Upgrades into | Khezu Thunder |
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 726.