Thanks for the correction. I was just skimming the Bulba page so I interpreted it wrong. Edited my postThe 10% accuracy penalty is basically "accuracy STAB", and applies to Sheer Cold (but not the other OHKO moves) being used by a non-ice type, so Lapras never has to worry about that except in the rare case that it gets hit by Magic Powder. Ice-type opponents are completely immune to the move, as is anything with Sturdy.