101Leafy researched the games.
Heavy Bagpipe

Vastly improved version of its previous incarnation known for its abilities.
| Class | Hunting Horn |
|---|---|
| Rarity | 6 |
| Attack | 1040 |
| Affinity | -5% |
| Defense | +20 |
| Slots | 1 |
| Price | 40,000z |
Upgrades
| Upgraded from | Great Bagpipe |
|---|---|
| Upgrades into | Heavy Bagpipe+ |
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 732.
Materials
Carbalite Ore ×15, Dragonite Ore ×20, Machalite Ore ×40, Basarios Wing ×2