101Leafy researched the games.
Dual Diablo+

Dual Swords with superior Defense and Attack power. Cannot Guard.
| Class | Dual Blades |
|---|---|
| Rarity | 7 |
| Attack | 336 |
| Affinity | -5% |
| Defense | +12 |
| Slots | 2 |
| Price | 70,000z |
Upgrades
| Upgraded from | Dual Diablo |
|---|---|
| Upgrades into | Blos Doppelganger |
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 714.