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 | 7 |
| Attack | 1040 |
| Thunder | 200 |
| Slots | 0 |
| Price | 50,000z |
Upgrades
| Upgraded from | Khezu Horn+ |
|---|---|
| Upgrades into | Purse Bop+ |
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 726.
Materials
Khezu Hide - Tan ×8, Carbalite Ore ×10, Thunder Sac ×5, Pale Bone ×2