101Leafy researched the games.
Twin Dagger+
Dual Iron Knives. No Defense, but increases your number of attacks.
| Class | Dual Blades |
|---|---|
| Rarity | 2 |
| Attack | 140 |
| Slots | 0 |
| Price | 1,120z |
Upgrades
| Upgraded from | Twin Dagger |
|---|---|
| Upgrades into | Dual Tomahawk, Insector, Glutton's Set |
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 712.