101Leafy researched the games.
Pickaxe Blade+

A sword resembling a distorted hatchet. Based on an ancient hunting weapon.
| Class | Great Sword |
|---|---|
| Rarity | 9 |
| Attack | 864 |
| Sleep | 170 |
| Defense | +14 |
| Slots | 1 |
| Price | 80,000z |
Upgrades
| Upgraded from | Pickaxe Blade |
|---|---|
| Upgrades into | Sleep Sword Zantoma |
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 682.
Materials
Hypno Fang ×4, OrangeHypnoPelt+ ×8, Thick Kut-Ku Scl ×4, Hypno Bezoar+ ×1