Double Slap

Double Slap (おうふくビンタ Round Trip Slap) is a damage-dealing -type move introduced in Generation I.

Generation I-III
DoubleSlap inflicts damage and hits between 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 critical hit, each hit per use will deal the same amount of damage.

DoubleSlap will end immediately if it breaks a Substitute. Bide and Counter will only acknowledge one hit of a DoubleSlap attack.

Taking the average number of hits into account, DoubleSlap could be considered to have an effective power of 45.

Generation IV
DoubleSlap will continue attacking after a Substitute is broken.

Generation V
If Focus Sash, Focus Band, or Sturdy activate before the last hit is dealt, the following hit will cause the defending Pokémon to faint. Each hit will also cause Weak Armor to activate.

Description
The target is slapped repeatedly, back and forth, two to five times in a row.