101Leafy researched the games.
Assassin's Dagger

Sword that uses only incredibly pure ore to improve offensive abilities.
| Class | Sword |
|---|---|
| Rarity | 1 |
| Attack | 140 |
| Slots | 0 |
| Price | 840z |
Upgrades
| Upgraded from | Hunter's Dagger+ |
|---|---|
| Upgrades into | Velocidrome Bite, Thunderbane, Poison Battleaxe, Kitchen Knife |
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 698.