101Leafy researched the games.
Lava Tasset X

Weak points between the shells have been reinforced, making this a work of art.
High-grade armor that only those who have defeated Lavasioth, the "Lava Wyvern," may wear. Lavasioth swims freely through magma, so armor made from its heat-resistant scales and shell stays reliably strong whatever the surroundings. Only a small part of the face is left open, and the narrow view is a worry, but hunters say it actually helps them focus.
Our translation of 復刻 ハンター大全 (KADOKAWA / Enterbrain, 2014), page 197.
| Part | Waist |
|---|---|
| Type | Blademaster |
| Rarity | 9 |
| Defense | 92 |
| Fire Res | +4 |
| Water Res | -3 |
| Thunder Res | 0 |
| Ice Res | 0 |
| Dragon Res | +1 |
| Slots | 2 |
| Table price | 16,100z |
Listed in the equipment tables of 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 925.
Skill points
| Terrain | +2 |
|---|---|
| Guts | +3 |
| ShortCharg | +2 |
| MixSucRate | -2 |
Materials
HvyLavasiothShl ×4, SpecLavasioFin+ ×2, Firecell Stone ×3, Ancient Fish ×6