Um...so, supposedly Radomus' main strategy was to use Trick Room. Except either I got lucky or only his Gallade, which my Emolga one-shotted with Acrobatics, has Trick Room.
I'm pretty sure he did not have an Exeggutor. His Hardcore version, maybe, but not his regular one. So basically bad AI kept him from using his main strategy...okay, if it's easier for me, I'm not complaining.