Problem is Champions stand as the cream of the crop unless you're fighting the new deal to promote them as a new hurdle/are Alder and they remain unbeatable. Anyone else below them? They're easier to beat, and Ash is easy to beat because he stupidly resets himself.
It isn't subtle how they want to promote the Gen 4 remakes.
(...While ironically putting Lucario away...until some sort of new power up is fabricated for it, which they can't possibly debut right now as it's too soon without a proper announcement for the games.)