Oooh, new Pokemon OC! This one's quite interesting...

Eleena was a Mismagius widely renowned for her immense magical prowess. She was able to cast damn near anything she wanted, and her skill with her spells made other witches' work look like mere party tricks in comparison. Because of this, she was held in high regard alongside even the Legendaries and Mythicals of the Pokemon world. It was awesome...at first.

It didn't take long for a few Pokemon to start worrying about what would happen if she was enraged enough to start throwing tantrums. They saw how strong she was, and they grew concerned about the effect it would have on their world...and it's not like anybody could stop her at her worst. So they decided to nip this issue in the bud.

While Eleena was taking a midday nap, a coven of witches set upon her and performed a lengthy ritual, one that would seal her within a mirror to keep her power limited and the world safe. By the time Eleena awoke, it was too late for her to escape...

Now Eleena sits around in her Mirror Realm, changing its form to whatever she desires with no effort needed...patiently waiting for the day to come...the day where her mirror is shattered, and she is granted freedom once more.