Ok first off, your art is very good/cute however I have a problem, opinion wise.
The main problem I have is the Xerneas. Xerneas has antlers so it is clearly more 'male' than anything. Antlers indicate a 'male' so the gijinka should have been a boy. The only female with antlers is a Reindeer/Caribou and Xerneas is clearly not that. He is a based off of the myth Cernnunos, the stag forest deity of reproduction.
Wether they are genderless or not, you should at LEAST attempt them to look like the gender they mostly resemble. What's wrong with a boy gijinka for once?
Personally (not just your work) I am sick of everyone making Pokemon gijinkas look like girls who portray male Pokemon, OR the majority are girls. I know some 'perv' thought of them all being girls but seriously, make some guy gijinkas to. It's pretty sexist making them 98 perecent all girl. Just my thoughts.