e: o i forgot teravolt lol. ignore me.
pz, borderline. boomburst is insane, and its fakespeed isnt even that weak thanks to adaptability. 252+ SpA Life Orb Adaptability Porygon-Z Boomburst vs. 4 HP / 252 SpD Eviolite Chansey: 229-270 (35.6 - 42%) -- guaranteed 3HKO. when chansey gets 3hkod by a special attacker not using fighting moves, there's something wrong. oh, you think you're transforming into it? better win the speed tie because - 252 SpA Life Orb Adaptability Porygon-Z Boomburst vs. 80 HP / 0 SpD Porygon-Z: 517-611 (78.2 - 92.4%) -- guaranteed 2HKO - you aren't taking another one of those either (that calc adjusted for chansey's base hp). i could see a pz banning, it could help stall, but overall im not too strong because porygon-z obviously lacks in bulk and speed.
now a thundy suspect is something i strongly support. its absolutely ridiculous. the problem with thundy is that one of its stabs also functions as recovery, so after it takes 50% setting up a nasty plot it just recovers back its hp while it kills you. did you plan on revenge killing it with scarf keld? oh, look, a prankster twave cripples you permanently as well as lets it live 25% of the time. plan on switching in to an electric type? oh look, your raikou just took a third of its health while thundy recovered his. not to mention tbolt doesnt outright kill from just about any electric type, so if it nasty'd and you're at like 50 or it has focus blast (which is good coverage), bye "counter"! stall at least has chansey and clefable to wall thundy, until you realize they both lose to taunt and the former also loses to nasty plot unless it has toxic (i prefer twave because offense is the strong archetype but toxic is good as well). oh and like dedicated special walls are even good switchins, because bolt strike mixed and full physical sets are both completely viable! the only negative to thundy is that fakespeed revenges it pretty easily, but there's no reason you can't just come in again later, because unlike other sweepers thundy recovers its hp while it kills which is what really seperates it for me. oh and at 90%, its not dying to ice shard from weavile so it can twave it, or ice shard from kyub for that matter (252 Atk Teravolt Kyurem-B Ice Shard vs. 0 HP / 4 Def Thundurus: 216-254 (72.2 - 84.9%) -- guaranteed 2HKO) so it can focus blast it or obwing it. thundy has been broken for a long time, its time for it to go.