101Leafy researched the games.
Large Bone Club

An unidentifiable, club-like bone useful only for training purposes.
| Class | Hammer |
|---|---|
| Rarity | 1 |
| Attack | 676 |
| Affinity | -10% |
| Slots | 0 |
| Price | 2,600z |
Upgrades
| Upgraded from | Bone Club |
|---|---|
| Upgrades into | Enormous Ham |
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 722.