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So after getting murdered by a Mega Salamence, just like everyone else I say that it should be quick banned. A simple SubDD set sets up on more than half the meta, including popular pokemon such as Landorus-T, Rotom-W, and Ferrothorn. A SubDD set usually runs one attack: Return/Frustration, but...
Your team lacks Defog/Rapid Spin. Considering Rotom-Wash doesn't like to be worn down in any way, how do you play around that on the team. How do you know when hazard removal isn't 100% necessary.
Mega Charizard Y as a CHECK
Charizard @ Charizardite Y
Ability: Drought
EVs: 248 HP / 252 Def / 8 Spe
Bold Nature
-Will-o-Wisp
-Roost
-Fire Blast
-Solarbeam
A Fire type checking a Water type sounds weird, but this actually works. Charizard (including non-mega) can switch into a Crawdaunt's...
Throwing in my two cents.
Terrakion
Choice Scarf: A+ - Excellent revenge killer who outspeeds the entire unboosted tier. Great Fighting/Rock STABs only resisted by the frail Mega Medicham and Doublade. It can also pull off a late-game sweep once he opponnts team is weakened enough so it can...
Trap house jumpin' like Jordan!
Also Mega Mawile is banned so your team no longer has to worry about being caught lacking to that.
Seconding Srn's suggestion about HP Fire on Reuniclus over Shadow Ball to cover up your Scizor weakness.
Nominating Mew as a CHECK
Mew @ Leftovers
Ability: Synchronize
EVs: 252 HP / 104 SDef / 152 Spd
Careful Nature
-Will-O-Wisp
-Taunt
-Roost / Soft-Boiled
-Knock Off
Mew is currently one of the best stallbreakers in OU atm. It also serves as a legit check to CroCune because it can switch in, use...