From Bulbapedia, the community-driven Pokémon encyclopedia.
DoubleSlap (Japanese: おうふくビンタ Round Trip Slap) is a mostly accurate Normal-type move introduced in Generation I that deals very little damage.
DoubleSlap does 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. Though technically only the first hit can critical hit,
each hit per use will do 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.
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