It's really kinda amazing how little she gets used in every version of the Kalos story
In the anime she never shows why she's a champion ever
In the Pokemon special manga she's knocked out of the fight by the traitor elite four member
In the game itself she only appears twice before you battle her, her team, while carrying the theme of various movies genre is extremely weak for when you battle her, she doesn't even get a model where as flares grunts, your friends, AZ and Lysnadre .do.
In the GOTCHA video she appears alone instead of with her Gardevoir
Is on the first title image of Pokemon Battle Masters yet she still hasn't been added to the game.
Personality is rather dull, she's down to earth and very friendly, seems to know Syncamore very closely as she refers to him by his first name yet we don't know the details of their relationship, childhood friends, former lovers, who knows.
The only thing we really know is that she and her Gardevoir are extremely close to each other and in some films her Gardevoir acts alongside her. Diantha had potencial but just like the rest of Gen 6 it will never be reached, at least gen 7 somewhat redeemed itself in some ways with Ultra and pissed everyone off even more at the same time.
