Calculation of Critical Hits is NOT based on Speed, as was the case in RBY.
A Critical Hit doubles the amount of damage done to the opponent by ignoring statistical modifications. During a Critical Hit:
- If the Defense stat stage for either Pokemon is greater than 0, it temporarily becomes 0.
- If the Attack stat stage for either Pokemon is less than 0, it temporarily becomes 0.
Determining Chances of a Critical Hit
A Critical Hit is based on value n and a random number. If the random number is less than n, then the attack is a Critical Hit. But how is n decided?
If Chansey is equipped with Lucky Punch, n=2. If Farfetch'd is equipped with Long Leek, n=2. If neither is true, n=0.
If Focus Energy has been used, then add 1 to n.
If the attack is Karate Chop/Razor Leaf/Crab Hammer/Slash/Aero Blast/Cross Chop, then add 2 to n.(Add 0 to n for any other attacks.)
If Scope Lens is equipped, add 1 to n.
After determining n, you'll get a Critical Hit (CH) number:
n CH Number
If the random number (from 1 to 256) is less than the CH Number, then the attack is a Critical Hit.