101Leafy researched the games.
Giadrome Balloon G

Crafted with the latest methods, it looks the same, but causes G-Level damage.
A hunting horn that has not only a Giaprey's head but can also make a sound just like its call. It is of course used as a hunter's weapon, but the Guild's scribe corps also find it handy for disguising themselves as Giaprey to observe their behavior up close.
Our translation of 復刻 ハンター大全 (KADOKAWA / Enterbrain, 2014), page 159.
| Class | Hunting Horn |
|---|---|
| Rarity | 9 |
| Attack | 1404 |
| Ice | 180 |
| Slots | 0 |
| Notes | White, Green, Light blue |
| Table price | 100,000z |
Songs
| Notes | Song | Effect |
|---|---|---|
| White, White | Movement Speed Up | Faster movement with weapon drawn for 3 min *2 |
| Green, White, Light blue | Health Rec [Mid]&Deodorant | Removes the smell + restores 30 health (33% chance) or 20 (67%) |
| White, Green | Health Rec [Lo]&Antidote | Cures poison + restores 20 health (33% chance) or 10 (67%) |
| Light blue, Green, Light blue | No Heat | "Heat Cancel [Hi]" effect for 4 min |
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 166.
Materials
Commendation G ×1, Giadrome Skull ×5, RobustWyvernBone ×10, Giadrome Claw+ ×15