101Leafy researched the games.
Pickaxe Blade

A sword resembling a distorted hatchet. Based on an ancient hunting weapon.
| Class | Great Sword |
|---|---|
| Rarity | 6 |
| Attack | 672 |
| Sleep | 150 |
| Defense | +8 |
| Slots | 0 |
| Price | 50,000z |
Upgrades
| Upgraded from | Rooster Decapitator |
|---|---|
| Upgrades into | Pickaxe Blade+ |
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 Beak ×2, OrangeHypnoPelt ×8, Hypno Bezoar ×1, Sleep Sac ×5