You don't have to, it's yours after all. I'll try and get one from someone else on here. I just thought fo you because from you I can be sure it's legit.
I have an SRable Arceus. I was too fickle and lazy to pick it up (although it cannot be EV trained anyways, lol).
I think I got Regi from someone. Didn't personally go to the event. :(