101Leafy researched the games.
Red Stripe

Combines bone with super strong shell material, allowing for high Defense.
| Class | Great Sword |
|---|---|
| Rarity | 2 |
| Attack | 624 |
| Defense | +4 |
| Slots | 0 |
| Price | 2,150z |
Upgrades
| Upgraded from | Bone Blade+ |
|---|---|
| Upgrades into | Red Pincer, Ceanataur Blade |
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 682.
Materials
Sm Hermitaur Shl ×5, Brute Bone ×2, Sharp Claw ×3, Black Pearl ×1