Surprised to not see Dragon Dance Zygardes potential sets here, and 252 Neutral +2 as well .O.
Here are one missing you might want to add in an easy to paste form C:
+2 Speed
578 / Zygarde / 95 / Neutral / 252 / +2
560 / Zygarde / 95 / +Spe / 116 / +2 (Sub DD Protect Analysis spread)
548 / Zygarde / 95 / Neutral / 192 / +2 (imsosorry aurora veil spread)
504 / Zygarde / 95 / Neutral / 104 / +2 (Analysis Double Dance spread)
+1 Speed
420 / Zygarde / 95 / +Spe / 116 / +1
411 / Zygarde / 95 / Neutral / 192 / +1
378 / Zygarde / 95 / Neutral / 104 / +1
Neutral
280 / Zygarde / 95 / +Spe / 116 / 0
274 / Zygarde / 95 / Neutral / 192 / 0
252 / Zygarde / 95 / Neutral / 104 / 0
Here are one missing you might want to add in an easy to paste form C:
+2 Speed
578 / Zygarde / 95 / Neutral / 252 / +2
560 / Zygarde / 95 / +Spe / 116 / +2 (Sub DD Protect Analysis spread)
548 / Zygarde / 95 / Neutral / 192 / +2 (imsosorry aurora veil spread)
504 / Zygarde / 95 / Neutral / 104 / +2 (Analysis Double Dance spread)
+1 Speed
420 / Zygarde / 95 / +Spe / 116 / +1
411 / Zygarde / 95 / Neutral / 192 / +1
378 / Zygarde / 95 / Neutral / 104 / +1
Neutral
280 / Zygarde / 95 / +Spe / 116 / 0
274 / Zygarde / 95 / Neutral / 192 / 0
252 / Zygarde / 95 / Neutral / 104 / 0