What Kaiyo meant ~20 posts ago was simply that Gamefreaks reasoning to put a shiny-block on legends might have been as an EXCHANGE for them having 3 perfect IVs.
There was no reason to go on tangents about how shininess worked in gen II or any of that, because no one said the two facts are related in the coding that generates pokemon, merely that gamefreaks choices to do so might have been.
I don't understand this statement. Food keeps things alive. Surely a mouth would make sense for Xerneas.
Why doesn't Xerneas or Zygarde have a mouth yet Yveltal does... Yveltal totally shouldn't have a mouth either to keep this mouthless thing a "trio" trait!
EDIT: Now that I think about it, why is Xerneas the only one with the first letter of it's name in it's eye as it's pupil? Surely it would have made sense to give Yveltal a "Y" and Zygarde a "Z" as well? Strange...
Lets say no pupil=blind, and no mouth=mute.
Xerneas, has pupils but has no mouth, Yveltal has a mouth but no pupils and Zygarde has no mouth and no pupils.
Xerneas is mute.
Yveltal is blind.
Zygarde is mute and blind.
Makes sense to me xD