Did you know that there's a thing called the 'Capture Arena' in Pokemon Shadows of Almia?

It's a discovery I made today. The Capture Arena is a facility for advanced Rangers where they test their capture skills against strong Pokemon. ( the ones that are usually hard to capture and can deal a lot of damage to your Capstick ) For example you have: Spiritomb, Cresselia, Gardevoir, Lucario, Gengar, Blaziken, Gabite, Toxicroak and much more. It's actually very challenging since you can have up to three strong Pokemon ( from what I've played ) at the same time.

It's easy to reach the Capture Arena. It's a post-game facility, I think. My sibling and I also completed all the miscellaneous mission so I'm not sure if you can go there directly after you beat the game.

To reach the Capture Arena, you first have to go to Puel Town then to its harbour ( head to the east after entering the town ) At the harbour, you'll meet three captains. The Blue Captain brings you to Puel Sea, Red Captain brings you to Boyleland while Yellow Captain brings you to Haruba Desert.

Talk to Captain Haruba and head to Haruba Desert.

Upon arriving you'll set foot in Haruba Village. From there you want to follow the map to reach the eastern exit of the village. There you'll see a woman facing South. She'll tell you there's a Wailord who often comes there. Afterwards, follow the path. It'll lead you a jetty. Wailord is waiting for you at the end.

Touch the Wailord. The game tells you Wailord want to bring you to Capture Arena. After a small cutscene, head North to discover the Capture Arena facility.