So a backstory is that You can have both halfs (or not) of Gender (Half Male, Half Female) and due to that you will be the same exept having a half that is exactly the half of someone else. (In Height, wideness and like any things) But however since you are half yourself and half someone else. You will have a mix of memories... From yourself and the half of someone else. (Note You can choose any Pokémon you want and it is fine like male or female they both look similar.)