101Leafy researched the games.
Heavy Bang

Reminiscent of a Great Sword due to the heavy ores used to make it. Loved by many.
| Class | Sword |
|---|---|
| Rarity | 9 |
| Attack | 308 |
| Slots | 3 |
| Price | 75,000z |
Upgrades
| Upgraded from | Odyssey Blade |
|---|---|
| Upgrades into | Master Bang |
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 700.
Materials
Eltalite Ore ×10, Carbalite Ore ×20, Machalite Ore ×30, RobustWyvernBone ×10