how come zygarde 50% is banned from OU? Like I get zygarde-complete and by proxy zygarde 50% with power construct, but there are a lot of other setup sweepers and OU is filled with fairies. Is there a specific reason that it's so good? All I can think of is dd with glare and thousand arrows which is admittedly very good but anything else that makes it so good?
Even without the incredible Ability that is Power Construct, Zygarde was really restrictive in the tier, only needing one offensive move, being Thousand Arrows. This move allowed Zyg to hit everything besides Tangrowth or Bulu for at least neutral damage, and the impressive amount of options it had allowed it to beat its "counters". DD Steelium set destroyed Clefable and Bulu, Sub Coil Glare sets would beat the popular Curse Mega Scizor with some full paras, and Choice Band sets had the immediate power to overwhelm common answers, even packing Toxic or Glare to beat Tangrowth in the long run.
Zygarde fit on all kind of teams, from Aurora Veil Hyper Offense teams to Balance builds abusing Toxic Spikes and passive damage in general. There wasn't a single viable Pokémon that could deal with all of its sets, and even the ones that checked a majority of them could get 1v1d because of how good Glare was.
Zygarde was, in my opinion, a very unhealthy presence that had the potential to ruin every build that wasn't running at least two checks to this beast.
see replays below for examples, and read the
Zyg suspect test post for a more detailed explanation