Okay, I have a question as a complete noob
1) Is RNG shiny considered legitimate?
2) Can we RNG shiny for Pokemon X Y yet?
3) Is this the same as checking the numbers or whatever was said before?
4) Are people willing to trade trophy shinies for 5IV pokemon with decent nature etc?
Dont know about the first 3
But for four.
At the beginning - yes a shiny will net you about any 5iv pokemon.
After a few weeks the shiny currency drops to
A decent shiny will get you a 5iv pokemon and it keeps dropping.
Last time I checked around on smogon
A basic shiny - a 5iv female (no egg moves) or two
A "cool shiny" - a 5iv female (egg moves) or maybe even 2 basic 5iv's
A "cool shiny" with a few useful 31 iv's (safari zone shiny) - a 5iv with a hidden nature or maybe a 6 iv or maybe some pokebank egg moves
A "cool" shiny with 3 or 4 31 iv's - just about any pokemon, probably multiple, 5iv, 6iv, hidden abilities, egg moves etc.
A shiny with 5iv's is about as perfect as you can get and will get you pretty much anything you want.
But with pokebanks shiny's have become less valuable. Even before bank some people had 5iv shinies in their "trophy case" I imagine their must be plenty around now