Whenever I use sheer cold with my Lapras, it says, "--- is unnaffected," . What's the big whoop? Thanks.
Accuracy = [(level of user-level of target) + 30]%. Sheer Cold ignores all changes to accuracy and evasion stats.
Sheer Cold only has a 30% chance of succeeding if your Pokemon is the same level as your opponent. In order to have 100% succession rate, your Pokemon needs to be 70 levels above your opponent.
Sheer Cold
Sheer Cold and other ohko moves dont affect Pokemon that are higher leveled and this comes up when you use a ohko move on a Pokemon of a higher level. So in order for sheer cold to work, you must use it on a Pokemon of equal or lower level. Source: http://bulbapedia.bulbagarden.net/wiki/OHKO