101Leafy researched the games.
Osteon Pick+

Made of high quality monster spine, it is as rough and powerful as it looks.
| Class | Sword |
|---|---|
| Rarity | 6 |
| Attack | 294 |
| Defense | +10 |
| Slots | 2 |
| Price | 35,000z |
Upgrades
| Upgraded from | Osteon Pick |
|---|---|
| Upgrades into | Rajang Club, Binding Blade, Melting Wail |
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 702.