Say hello to what is arguably the most broken Pokemon to ever be allowed in OU, despite getting quickbanned soon after.
Zygarde-50% @ Leftovers
Ability: Power Construct
Careful Nature (+SpDef, -SpA)
EVs: 248 HP, 8 Atk, 252 SpDef
- Thousand Arrows
- Sleep Talk
The strategy here is simple. Send Zygarde in on something that can't do over 75% damage and above to it in a single hit, which isn't too hard with Zygarde-50%'s solid bulk. Activate Power Construct and transform. Rest to fully heal yourself, and alternate between Sleep Talk, Coil and Rest and laugh as the opponent does pitiful damage to you. When you accumulated enough boosts, sweep his entire team with Thousand Arrows.
Let me emphasise one thing: This thing never dies. Zygarde-50% is already a very bulky Pokemon, but this thing takes bulk to a whole new level. For a testament to how bulky this thing is:
252 SpA Choice Specs Latios Draco Meteor vs. 248 HP / 252+ SpD Zygarde-Complete: 474-560 (74.6 - 88.1%) -- guaranteed 2HKO after Leftovers recovery
It lives a Specs boosted, STAB Super-Effective Draco Meteor from Latios. That means, once its checks and counters have been removed or weakened, send Zygarde in and its GG. Even without any investment into Defense, it has insane physical bulk. Primal Groudon, which has 504 Attack when fully invested, barely manages a 3HKO with STAB Precipice Blades.
252+ Atk Groudon-Primal Precipice Blades vs. 248 HP / 0 Def Zygarde-Complete: 234-276 (36.8 - 43.4%) -- 99.3% chance to 3HKO after Leftovers recovery
252+ Atk Choice Band Tapu Bulu Wood Hammer vs. 248 HP / 0 Def Zygarde-Complete: 412-486 (64.7 - 76.4%) -- guaranteed 2HKO after Leftovers recovery and Grassy Terrain recovery
Seriously, why was this thing ever allowed in OU?