101Leafy researched the games.
Ioprey

A subspecies of Velociprey often found in subtropical zones. Sacs in their throat contain a powerful poison that slowly drains the Health of their prey.
Monster List No. 12
Carving
Number of carvings: 1 (BradyGames, Monster Hunter Official Strategy Guide, 2004, p. 82). The guide (p. 78) splits the carves by Quest Level: early quests are levels 1 to 3, latter quests 4 to 6.
Early quests
| Item | Chance |
|---|---|
| Ioprey Fang | 15% |
| Ioprey Scale | 30% |
| Ioprey Fang | 30% |
| Ioprey Hide | 15% |
| Ioprey Scale | 8% |
| Ioprey Scale | 2% |
Latter quests
| Item | Chance |
|---|---|
| Ioprey Hide | 15% |
| Ioprey Scale | 30% |
| Ioprey Hide | 30% |
| Ioprey Fang | 15% |
| Ioprey Fang | 8% |
| Ioprey Fang | 2% |