>>32650424this setup is predictable as all hell, but it's 2HKO guaranteed, RIP if he pulls psychic with his 4x SE, so he's gonna have to EV in speed to strike before polyrong 2
252+ Atk Choice Band Croagunk Helping Hand Brick Break vs. 252 HP / 252+ Def Eviolite Porygon2: 102-122 (53.1 - 63.5%) -- guaranteed 2HKO
but yeah crogunk is a bit too frail to rely on, especially with the band over evolite
and while I'm sure there'll be plenty of psychic moves being thrown around, fire will be EVERYWHERE, kartana is the head hancho - everyone's out to get him.
only other crazy shit I could think of is like chandelure, getting flash fire boosted by a teammate (hp fire, whatever), and a possible mudslap from a friendly jolteon to activate a weakness policy for +2 SpATK
+2 252+ SpA Flash Fire Chandelure Helping Hand Flamethrower vs. 252 HP / 252+ SpD Eviolite Porygon: 237-280 (137.7 - 162.7%) -- guaranteed OHKO
it'll be the craziest way to get a OHKO I can think of, but it is possible.