101Leafy researched the games.
Red Tail

Lance made from fire wyvern materials. Its faults are covered by technology.
| Class | Lance |
|---|---|
| Rarity | 3 |
| Attack | 253 |
| Fire | 250 |
| Slots | 0 |
| Price | 2,600z |
Upgrades
| Upgraded from | Wild Bone Lance+ |
|---|---|
| Upgrades into | Spear of Prominence, Blue Tail |
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 750.
Materials
Rathalos Scale ×3, Rathalos Shell ×2, FireWyvern Fluid ×4, Flame Sac ×2