I used sheer cold against Wingull and Floatzel after using mind reader to make it hit and it had no effect. Why?
Which other one-hit-ko attacks have no effect against certain types? They are fissure, horn drill, sheer cold and gullitine.
OHKO moves will fail if your opponent is a higher level than you.
But otherwise it can affect all pokemon types, unlike the other OHKO moves.