Question about Shiny Hoopa

[Xalo]

I'have a question about him

All know this pokemon is not legit but in battle i'see rarely a hoopa shiny but when i'see a hoopa shiny, just how they can get a hoopa shiny and play it in online (the player was vs me) 

So my question is how they can get a not legit Pokemon (Hoopa Shiny) in online ?

 

[Delta Blast Burn]

Nintendo hack checks are not very comprehensive, so some things slip through.

[Xalo]

Probably but i'think is not rarely but a bug on a stats on the Hoopa, on Youtube you can see some lives who they gives like 200 shiny Hoopa