I was shiny hunting a Heracross in Colosseum because i wanted to do a full ribbon master with it. I noticed when I was looking at its IVs in pkhex that it was marked as illegal and I'm not sure why. The way I hunted it was not in the usual spot Realgam Tower but in the post game location Snagem Hideout, which I was able to do by letting Cipher Peon Dioge knock out all my Pokemon with just his Ariados and Masquerain so I wouldn't see his Heracross. Once he defeats you, he wont battle you again so you can get through the main story without locking in the Heracross' stats and then later on shiny hunt it in Snagem Hideout in the post game. Could it be marked as illegal because its expected that you see it during the main story and there for should have its stats locked in once you would see it in the Snagem Hideout later on?
