101Leafy researched the games.
Buster Sword

An improved Iron Sword for beginners. A capable weapon against all sorts of beasts.
| Class | Great Sword |
|---|---|
| Rarity | 1 |
| Attack | 288 |
| Slots | 0 |
| Price | 500z |
Upgrades
| Upgrades into | Buster Sword+, White Serpentblade, Blango Destroyer |
|---|
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.