Originally Posted by Fat Pokemasta77
Im no pro at this but I do not see why Terrakion is a threat. The common core of Scizor and Rotom-W have no problem with it. Scizor just has to come in Bullet Punch and switch out while Rotom-W can just hit it with a STAB Hydro Pump and switch out without really being threatened by it.
Terrakion is a threat simply because no common VoltTurner, with the exception of Landorus-T, likes switching into its STAB-boosted (and possibly Band-boosted) moves. SubSD variants can also exploit VoltTurners locked into the wrong move by using them as set-up fodder. Yes, there are ways to check it, as you mentioned in your post, but such methods usually result in the loss of at least one Pokemon. However, Scarfed variants are no problem for VoltTurn teams since they don't hit hard enough.