I've finally finished my quest to get the Tao Trio as all good IV'd shinies. It took about a month, but I got my desired Zekrom (from AS), Reshiram (from OR), and two Kyurems (one on AS, one on OR).
All are shiny, here are the IV spreads, I used a IV calculator to get a close reading, then did the level up and reset to get their exact IV stat, using Marriland's IV Calculator.
Kyurem (Modest for W-Kyurem): 30/24/30/31/31/31
Kyurem (Adamant for B-Kyurem): 31/31/31/12/30/31
Zekrom (Adamant): 31/31/30/16/31/31
Reshiram (Modest): 30/8/31/31/31/31
And as I'm generous, I'm going to be cloning these and doing a giveaway in the Trade Corner Quick Trades, after my current one and the next one, so it will be about 2 weeks as each of the others will be a week long. Keep an eye out for it when the time comes if you want these bad boys.
EDIT: Here's proof for anybody that wants it.