What it does
Sheer Cold is a one-hit KO move. It deals fixed damage equal to the target's full HP, bypassing all defensive stats, items, and stat changes. The base accuracy is 30%. Each level you have above the target adds 1% accuracy. If you're lower level than the target, the move simply fails.
A few mechanics worth knowing. Focus Sash and the Sturdy ability can survive the hit at 1 HP — that's one of the only ways to not get instantly KO'd. Any use of Protect or Detect blocks it outright.
Screens, burns, stat drops — none of that matters once the move lands. The KO is unconditional. But 70% of the time it doesn't land, and that's the real cost.
Who runs it
Glalie (46%) is the primary carrier. Its niche in competitive is built partly around this high-risk win condition, and Inner Focus keeps it from getting shut down by Fake Out before it can fire. Mr. Rime (18%) carries it as a surprise option in otherwise support-oriented sets. Vanilluxe (8%) occasionally slots it in as a tech pick.
None of these are top-tier attackers. That's the pattern: Sheer Cold shows up on Pokemon that can't win through conventional damage, turning a statistical long shot into a legitimate route to victory.
How to use it
The honest framing: this move misses more than it hits. Use it when you're behind and need to generate an unlikely win, or when an opponent has a bulky setup sweeper you can't efficiently break through normal damage.
The strongest case for firing it is when your opponent has one Pokemon left and you're losing on conventional damage math. At that point, 30% is better than 0%. In doubles, it also creates decision pressure — opponents who know you carry it often play more conservatively, which can open up your other moves.
Speed matters. Sheer Cold has no priority. Against faster targets you'll take a hit first. Under Trick Room, slow Pokemon move first, which gives Sheer Cold users a better window to act without eating an attack.
Tips & strategy
Don't telegraph it. If you use Sheer Cold every turn, opponents will switch out or spam Protect. Mix it with regular attacks so they can't predict it — then fire it on a turn they've committed to staying in.
Against Focus Sash users, chip them to full HP first through chip damage or prior turns, then land the OHKO. Requires setup, but it removes the one reliable counter to the move.
This is not a move for safe, structured play. It's for games that are already going sideways. Keep it in that mental slot — a last resort that occasionally rewrites the outcome — and you'll calibrate your expectations correctly.