ShinyCharyZard
Too old for your rubbish..
But there's never been a large group of the same legendary on-screen before now. At most, there's been the two Deoxys. "Herds" implies a LOT more than two, so there should easily be a few who want to go with a trainer.
Ah, don't give me that "Legendaries can't be caught" nonsense. Brandon's Regi's already ruined that idea. Not saying that catching a Mew or Deoyxs would be easy, but it's doable.
Regi's are among the catchable legends...Along with Articuno, Zapdos, Moltres, Raikou, Suicune and Entei...Remember when Max clearly stated that Articuno was the strongest pokemon you could capture?