Help required

[Supergengar234]

okay so,i transferred a shiny xerneas from Omega ruby
i got it off wondertrade
id really like if there was a way to make it legal
can anyone help me?

 

[SimulatedComa]

How do you know it is illegal?

I am more than happy to take a look at it and let you know if it is ok, if not I can probably sort it so it is legal.