Three dimensions (X, Y, Z)
DNA (X&Y chromosomes)
Norse mythology (Xerneas is the stag at Midgard (x axis), Yveltal is the eagle at the top of the world tree (y axis), and the Z legendary will be the serpent at the bottom (stretched out the z axis). Mewclone will be the squirrel the runs up and down the tree.
Alternatively
>X&Y is based on gender
>Male protag is actually tomboy girl protag
>Female protag is actually a boy trap
>Sylveon is actually TRANSylveon
>Gimmick is it changes gender depending on version
>Fairy type
>Enemy team is Team CIS
guys pls