Kalesp is a genetic clone of a mew that scientists found a piece of its dna out in the jungle. One scientist that knows that Team Rocket had the tech to clone splice a mewtwo was able to get the tech like theirs to make the same experiment but he wanted to make this mewtwo a good one. He successfully made mewtwo but it was different from the other one Team Rocket made more furry and treated it with love and kindness and cared for it like it was his son and trained him well but one day the scientist came down with a virus that was slowly killing him and Kalesp tried everything to take care of him but he knew it was only a matter of time before he passed and told Kalesp to not let your anger and/or rage cloud your judgment and be the good mewtwo i raised you to be and take care of yourself. The next day he passed and Kalesp didnt see the need to stay at the scientists lab any further so to honor him he sent him to any family or friend that knows him and gave him a proper burial to honor him. After the burial Kalesp caught something at the corner of his eye and looked and couldnt see it but felt the presence of someone nearby and channeled his power and sensed it and went towards it but it started moving away from him and continued to pursue it till he found himself in a sacred place and the figure materialized in front of him and she honored him and she says "greetings Kalesp im Athena and welcome you here to my home you can come and go as you please no one will ever find this place and i know what has happened to you in your life and want to help you if you wish." Kalesp responds "why do you want to help me?" She says "cause the human you were with wanted to atone for the sins of Team Rocket and made you as a counter balance against the other mewtwos that were made. There are some like you but you are more pure hearted then most others and you can help me and other mews help other mewtwo that only want to destroy life." He thinks it over and decides that he wants to honor his fathers sacrifice to make him and says "alright ill help ill help track down other mewtwos that would do harm to anyone." She says "good we'll make a great team together."

A little back story for Kalesp and Athena here hope you enjoy :)

Kalesp attacks
Miracle Eye
Aura Sphere
recover
Psychic

Athena attacks
transform
Psychic
Aura Sphere
Reflect Type

Art by
original here http://www.furaffinity.net/view/28319618/

Kalesp and Athena are mine

Mewtwo and Mew belong to Game Freak and Pokemon Company