Pokemon Ranger: Shadows Of Almia
Note: This game is also titled Pokemon Ranger: Batonnage .
Capture Arena
Successfully complete the main storyline. You can now ride Wailord from Haruba Village to reach the Capture Arena.
Fight Darkri again
After completing the game, go back to the top of Alturi Tower. At the top, there is a man. Speak to him, and you can fight Darkri again. However, once you have fought him, you will lose all your Pokemon.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art.