101Leafy researched the games.
Handmade Frog

Warm Hunting Horn produces the tranquil songs of frogs. A bit of home for the heart.
| Class | Hunting Horn |
|---|---|
| Rarity | 6 |
| Attack | 884 |
| Water | 450 |
| Slots | 2 |
| Price | 40,000z |
Upgrades
| Upgrades into | Handcrafted Frog |
|---|
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 742.
Materials
Tailed Frog ×2, Dragonwood+ ×2, Frog ×5