Yep its hacked. I have personally ran into mitsuki myself, and I love when I get into a wondertrade and I she her name (yes it is a she, female player.). I wouldn’t worry too much, I have never seen her give out stat-max Pokemon, just shiny hacked. So no, I don’t condome what she is doing, since its purly cosmeteic, and inappauld her. But yeah, it’sdefinity hacked, but dont worry, its just shiny hacks, not stat hacks. Your game is safe.