>>24992961To be fair, Diantha managed to be a champ one generation later, so it isn't that big of a stretch that a pathetically bad trainer makes it to the champion spot.
Hell, compare Bianca's team to the most recent champ's:
Stoutland
(Monkey Trio, let's say Simipour)
Musharna
Meinshao
Chandelure
(Starter, lets say Serperior)
vs.
Hawlucha
Tyrantrum
Aurorus
Gourgeist
Goodra
(Mega)Gardevoir
Hell, I'll even make it sporting and take one mon away from Bianca. Say adios to a monkey or a starter. Even with the mega advantage, Diantha's team sucks.