101Leafy researched the games.
Bone

A normal bone sharpened into a Long Sword. Above reproach as a practice weapon.
| Class | Long Sword |
|---|---|
| Rarity | 1 |
| Attack | 336 |
| Slots | 0 |
| Price | 500z |
Upgrades
| Upgrades into | Large Bone |
|---|
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 690.
Materials
Bone ×2