Yeah, I think I did Battle Maison in X/Y (or whatever the battle thing was in Kiloude City), and it was pretty cool. I only did it for the BP for Gligar's evolution item though.
I've played Radiant Dawn for the Wii, but I never finished it & I don't have it anymore. :c (Not quite sure what happened to it, tbh. :/) I also have Awakening, which I still have, but I have yet to actually finish it.