Is there a particular reason why you've chosen not to use him in a real battle? If you think the species might not be practical in battle, I can tell you with certainty that they hold up surprisingly well.

[As if on cue, his own Klefki comes floating in from the background, peeking out from behind Rideaux's head. She wants to know what's going on!

Rideaux doesn't pay her much mind, though.]

I recently used mine in a battle against Falkner, the Gym Leader. It was almost pitiful how poorly his Noctowl performed against her, really.