So I just got unlucky then (Gible had HP/SpA/Spe and Deino had HP/Spe). Thanks for the answer.The Destiny Knot passes down 5 random stats from the parents and the sixth will be a random value between 0 and 31. So there's a 1/32 chance of getting a 0IV in the 6th stat. Even if both parents are perfect you will always get one completely randomised IV.