101Leafy researched the games.
Agito

A traditional Bone Sword made from an abundance of high quality materials.
| Class | Great Sword |
|---|---|
| Rarity | 6 |
| Attack | 960 |
| Slots | 0 |
| Price | 25,000z |
Upgrades
| Upgraded from | Executioner |
|---|---|
| Upgrades into | Wyvern Agito, Rusty Claymore |
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 680.
Materials
Hrd Monster Bone ×5, Med Monster Bone ×20, Lg Monster Bone ×10
Plus Class Tcket ×1, Hrd Monster Bone ×1