361 Sp.Atk... I don't think so... If it had a nature that boosts Sp.At, as well as Max IV's and EV's in Sp.Atk, it could have 447 Sp.Atk... It could be Ev'd, but with a really bad nature and IV spread...
Makes me wish I collected shinies more... The only UT shiny that I have is a Goldeen, and a few Lv 100's with really rubbish stats, and I really mean rubbish...