>>30850372That's the thing though, Hilbert sort of didn't become a Champion. When he fought N, it was outside of the League, and he had time to heal and catch a new Pokemon. Those are things you can't do between E4 battles. And to back that up, he was never referred to as a Champion in BW2.
Still, I can imagine a situation like Alan and Manon from anime. One following the other, simply because reasons.