Reserving Zygarde if possible. No longer shall it be just a mere Garchomp clone!
If only Galvy wasn't taken... zerobreaker.
-
(Small) - 108 / 90 / 121 / 81 / 110 / 90 (- / -10 / - / - / +15 / -5)
-
(Average) - 108 / 100 / 121 / 81 / 95 / 95 (- / - / - / - / - / -)
-
(Large) - 108 / 110 / 121 / 81 / 80 / 100 (- / +10 / - / - / -15 / +5)
-
(Super) - 108 / 120 / 121 / 81 / 65 / 105 (- / +10 / - / - / -15 / +5)
Essentially, the biggest asset is the Super forme, which now outspeeds any equally invested Garchomp, though only by a tiny bit and still having a slightly lower attack. The main advantage is better physical offense, though at the cost of special Bulk. However, the Small forme does have solid 108/121/110 defenses and mediocre but not unusable speed, so any possible defensive roles for Zygarde become a little more viable, such as it's parashuffler set, for example. Large and Average become those two awkward formes in between more than anything, though if you're worried about Special Attackers, they may be beneficial.
Hopefully this thing gets a Mega, 'cause even with something like this, Zyggy is only so useful, thanks to not having a usable ability.