Unlock Conditions
You can unlock Ornitholestes by capturing three of each Reptile-type fiend, which includes each of the following:
HP: 800,000
Ornitholestes is an easy fiend to defeat. It has high Evasion and high Agility stats, making it difficult to hit, but using 
Aim and 
Luck can increase your chances.
You should consider power leveling your characters and obtaining the Celestial Weapons, in this case, for Yuna specifically. Check out the Advanced section of the Tips and Tricks for more information. With properly leveled characters, this fight is pretty straightforward.
| Ability | Description |
|---|---|
 Sensor |
“Immune to sensors.” |
| Scan |
“Immune to scans.” |
Steal:
Rename Card (common)
Chocobo Wing (rare)
Drops:
Gambler’s Spirit (x2) (common)
Dark Matter (rare)