Okay so a few things.
One, it seems like some Pokémon’s stats are incorrect. During my 3rd elite four battle, my opponents lvl 89 chandelure outsped my lvl 89 mega feraligatr. Not only Should this not happen, the wiki has it totally wrong with the elite four teams and moves. Eudard didn’t have garchomp he had tyranitar.
And Yukis pokemon not only have items, their move sets are NOT those listed on the wiki. This info cost me the elite four run. I’ve included pics for proof.