Comet Punch inflicts damage, hitting 2-5 times per use. There is a 37.5% chance that it will hit 2 times, a 37.5% chance that it will hit 3 times, a 12.5% chance that it will hit 4 times, and a 12.5% chance that it will hit 5 times. Although only the first hit can be a Critical Hit, each successive hit will deal the same amount of damage.
Comet Punch will end immediately if it breaks a Substitute (In Generation II-V: continue attacking). Bide and Counter will only acknowledge one hit of a Comet Punch attack.