There are some things you just cannot achieve with an egg. Not every single frame has a 31/31/31/x/31/31 or any combination of 31/a/b/ what have you iv chance. Sure, the game is fooled into thinking that it's legit, but that doesn't trick other people if he intended to trade them. Furthermore, pokemon can take days and 100's of tries to get the correct nature / moves / iv's in an egg even legitimately. So, for everything to be just the way he liked and in egg form automatically should raise a black flag in anybody's mind.