How to know if Ho-oh or any other legend is legitimate? [duplicate]

Yesterday, I placed a Zygarde on the GTS, and I asked in return for a Ho-oh. To my surprise today, I got the Ho-oh, it was shiny, and it had 5ivs! (all in the good places!)

I checked to see the Ho-oh's summary, and it said

Travelled from time and Space from Johto to get to Kalos

What does this mean? is my Ho-oh (gulp) ..not legit?

pokemon-series pokemon-sixth-generation

Best Answer

If it travelled through Pokémon Bank (ie. came from Johto in this case) then it has already been through Nintendo's hack checks. With that in mind, it's either legit or good enough of a hack to not be detected.

That said, one of my friends has a Bug Bite Scizor with a Kalos-native symbol on its Summary, and another friend is probably personally responsible for the delay in Bank's release due to pointing out some major flaws in the hack checking system!

Anyway, point is, just because it's shiny and has high IVs does not mean it's hacked - it just means the person who obtained it has no life :p Okay, that was mean...