(not related to Battle Frontier, despite the fact I will use characters meant for it)
One of Pokemon Andrew acquires after leaving Ohana Islands and continuing his journey across other regions. Might work on others soon...

Name: Diana
Previous owner: None
Moves: Teleport, Magical Leaf, Psychic, Telekinesis
Nature: Relaxed

Caught as Kirlia, Diana was the first Pokemon Andrew got not long after arriving to Hoenn region. Kind and good-natured, she quickly befriended other Pokemon in the team and grew fond of her trainer, often popping out of her Pokeball and following him along with Veronica. Her somewhat curious and borderline naive personality would sometimes get her into trouble, luckily for her Andrew would intervene and help her out as quickly as possible, earning her affection and in turn making Sylvia jealous of their relationship. After listening to music on Andrew's small portable radio, dancing became her favorite pastime activity, often asking Andrew or some of other Pokemon to be her dancing partner.

Character and art by me.
Pokemon belong to Nintendo and Game Freak