Ales has a special necklace refered to as a Morph Chain, Given to him by Trinity an Arceus... It is special in when a charm is placed on it that contains a genetic sample it will morph him into a similiar creature with someone of his human features remaining such as his hair.

His favorite charm is this Lucario spike which grants him a Lucario form.

Art made by a friend of mine, this Mirror Reflection thing came out well.