Okay, after running some calcs I determined that the only viable pokemon in the tier who avoid the 2hko (w/ SR) from the standard set (Ice Beam, Dark Pulse, Hydro, Gunk Shot, 40 atk, 216 SpAtk) are chansey, empoleon, ferrothorn, manaphy, porygon2, suicune, tentacruel and alomomola. Now...