0718 Zygarde(50%Forme)

Dragon Tail is an excellent Fast Attack, boasting incredible damage and average energy generation. Zen Headbutt and Bite are both very underwhelming.

Crunch is Zygarde's cheapest Charged Attack and offers some coverage and a nasty 30% debuff chance. Earthquake is expensive, but is important to give Zygarde coverage against Steel- and Fairy-type Pokemon and benefits from STAB. Outrage is a powerful Charged Attack, but Zygarde struggles to find a moveslot for it. Hyper Beam is Zygarde's only option to avoid getting walled entirely by Togekiss, but is far too expensive for any practical use. Bulldoze is slightly cheaper than Earthquake and takes one less Dragon Tail to reach, but the steep drop in power makes it a largely outclassed option.

Zygarde-50% is a fairly bulky Pokemon - its stat product is comparable to Walrein's and can take a few hits. It does, however, suffer from a clunky moveset, so Zygarde-50% is usually outclassed by other Dragon-type choices such as Altaria and Dragonite. Still, it may find a use or two in certain cups.

Zygarde-50% fares a bit better in the Ultra League, but not by much. The increased bulk in this league allows Zygarde-50% to reach Earthquake more consistently. Relatively slow moveset and competition with other Dragons such Giratina-A, Dragonite makes Zygarde a rather niche pick.

Zygarde-50% actually has fairly respectable stats in the Master League, but even then it's a tad underwhelming. It does not have enough qualities that allow it to stand out from other Dragons, and can be seen as a weaker but bulkier Garchomp.