Knock off is only x1.5 dmg when they have an item. Its viability on Scizor is somewhat questionable; there are other pokemon who can use it better, I think.
Yeah I found that out later. I remember reading somewhere when the game first came out it was 2x but that's ok. Mega Scizor still uses Knock Off better than most pokemon. I've been seeing a lot of Pursuit talk but Knock Off actually has better overall damage against bulky pokemon. While it's only a little bit stronger on the first hit that pursuit, removing leftovers essentially adds an extra 6.25% for that turn which can mean the difference between a pokemon dying and not dying to Bullet Punch. Knock Off is such a great move.
thoughts on good scizor partners aside from the obvious rotom-w?
One thing scizor absolutely hates is the threat of burn, especially if you're using Mega Scizor or just any non-CB U-Turn all the time set. To this end I find Bulky Clefable to be a great partner. It's WoW immune and handles Rotom-W extremely well.