→In the main series: Please do not erase this post. When I first added Diantha to the list, the episode hadn't aired in the US at the time. The episode has since aired and it even says in that Ash and his friends meet Diantha.
In [[Unova]], Ash has met:
* [[Caitlin]] in ''[[BW090|Jostling for the Junior Cup!]]''.
It has been stated by [[Lucian]] in ''[[DP035|An Elite Meet and Greet!]]'' that when a Trainer wins their respective region's [[Pokémon League Conference|Conference Tournament]], they can participate in the Champion League, fighting the four members of that region's Elite Four, and then possibly the Champion as well. It has also been shown that an Elite Four member can challenge the Champion and obtain the title from him or her in battle.