Yep, I should really ask Shiro about this.
But even if it Shiro said no, having every pokemon in choco would be quite a great accomplishment.
In this condition, with pinkan still at high demand, I don't think Shiro is considering about adding another sprite.
So maybe I'll finish them first, then ask Shiro? ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬