101Leafy researched the games.
Hero's Blade Replica

Replica of the Sword used by the Hero of Kokoto. A mere shadow of the real thing.
| Class | Sword |
|---|---|
| Rarity | 4 |
| Attack | 140 |
| Affinity | 20% |
| Slots | 1 |
| Price | 5,000z |
Upgrades
| Upgrades into | Master's Replica, Legendary Replica, Twin Nails |
|---|
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 704.
Materials
Hero of Kkto Bio ×1, Black Pearl ×2