He's a lazy Mewtwo who enjoys lounging beside lake or rivers of his world. Only time he isn't being lazy and enjoying his time to himself is when his two Explorer teammates wake him up.

As for his mask. He's able to remove it as you'll have a fairly normal Mewtwo face under it.

He's a rapid swimmer and due to the rules of his world, he uses water and his psychic powers together in tandem in a sort of, Water Bender style, while his psychic powers help him manipulate the water better than a normal Water type would have access to in his world.

A Retyped Mewtwo I adopted from the wonderful  ClyCly