Pokemon Safe Is It Safe To Transfer Possibly Hacked Pokemon To Diamond?

Is it safe to transfer possibly hacked pokemon to Diamond? - pokemon safe

My friend just bought green (or something in this generation, I can not remember which). The boxes are filled with level 100 Pokemon, including many, many legendary pokemon event. I think they are pirated, especially because it also 99 master balls and rare candies 99th My friend wants to pokemon and says he does not believe that they are pirated. Damage could transfer your copy of Diamond?