Well i might start this thread off with a defensive booster missy ive been playing around for awhile.

Name:Mismagius
Moveset name:Defensive Booster
Move 1:Nasty Plot
Move 2:Will-o-Wisp
Move 3:Shadow Ball
Move 4:Hidden Power Fighting/Thunderbolt/Substitude
Item:Leftovers
Nature:Calm
Evs:252 HP/128 Sp Atk/128 Spd(Im coming up with an Ev spread.)
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This Mismagius can beat some of its usual counters(Namely Registeel) While still having the ability to sweep unprepared teams.Use nasty plot,Crippling an incoming registeel(Assuming its not resttalk) or a physical sweeper that can threaten mismagius if needed.You can then start attacking with your STAB shadow ball or whatever move thats in the last spot(Bar substitude)Hidden power fighting is used to hit steels while also boosting an unresisted attacking move combo.Thunderbolt can hit honchkrow.And substitude can be used to protect you from thunder wave/toxic users.
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Clacs are here
556 Atk vs 286 Def & 393 HP (80 Base Power): 168 - 198 (42.75% - 50.38%)
This shows missys boosted shadow ball Vs 248 HP/0 Sp Def Milotic,A 2HKO so Erazor shadow ball can still do a number at it.
556 Atk vs 412 Def & 364 HP (70 Base Power): 136 - 162 (37.36% - 44.51%)
HP Fighting Vs Registeel,Wont 2HKO but still does some cool damage.While registeel can only muster:
211 Atk vs 156 Def & 324 HP (80 Base Power): 58 - 70 (17.90% - 21.60%)
With iron head after it is burned.
More clacs will be updated later on.