For me, they were just one more set of trainers to beat on my way, with the addition of having to give them a random word afterward. I never out much thought into what word I'd tell them (sorry guys, "the way I feel" can't be summed up into a single word on the Pokemon word choice system, so I'm gonna give you something random) and I really didn't seek them out for matches other than where I would encounter them on a normal playthrough.
I really don't remember too much about them besides that, tbh.
I battled them really often. I can remember that I battled them with Blaziken, and I think Sableye. (Wich was freaking stupid cuz Blaziken owned Magneton, and Sableye couldn't do anything against exploud xD)