101Leafy researched the games.
Viper Bite

Upgraded serpent blade made from Genprey. Contains paralyzing Genprey Fang.
| Class | Sword |
|---|---|
| Rarity | 2 |
| Attack | 140 |
| Paralysis | 220 |
| Slots | 0 |
| Price | 1,290z |
Upgrades
| Upgraded from | Snake Bite+ |
|---|---|
| Upgrades into | Deathprize, Hydra Bite |
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 700.