101Leafy researched the games.
Sentinel

A Great Sword that can also serve as a shield. Stresses defensive strength.
| Class | Great Sword |
|---|---|
| Rarity | 2 |
| Attack | 576 |
| Defense | +20 |
| Slots | 1 |
| Price | 2,600z |
Upgrades
| Upgraded from | Defender |
|---|---|
| Upgrades into | Barbaroi Blade, 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 686.