101Leafy researched the games.
Carbalite Sword+

Made with an abundance of Carbalite steel in a classic shape. Very powerful.
| Class | Great Sword |
|---|---|
| Rarity | 6 |
| Attack | 960 |
| Slots | 0 |
| Price | 35,000z |
Upgrades
| Upgraded from | Carbalite Sword |
|---|---|
| Upgrades into | Lacerator Blade, Decider, Demon Halberd |
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 684.