Bone Rush inflicts damage, hitting the target 2-5 times per use. There is a 33.3% chance that it will hit 2 times, a 33.3% chance that it will hit 3 times, a 16.7% chance that it will hit 4 times, and a 16.7% chance that it will hit 5 times. Ignoring the possibility of missing, it will hit 3.168 times on average, giving it an average power of 79.2.
If a Focus Sash, Focus Band, or Sturdy activates before the last strike is dealt, the following strike will cause the defending Pokémon to faint. A Focus Band can still activate repeatedly to prevent fainting, but each chance is independent of the previous one.
If the target has Weak Armor, each strike will activate it. Bide and Counter will only acknowledge the last strike of this move.
The user strikes the target with a hard bone two to five times in a row.