The Muscle Band (Japanese: ちからのハチマキPower Headband) is a type of held item introduced in Generation IV. It boosts the power of the holder's physical moves.
In Pokémon UNITE, the Muscle Band is a held item that causes the user to deal additional damage with basic attacks based on the target's remaining HP (with 0.35s cooldown for each target) and increases their Attack and Attack Speed. The damage increase is 1/2/3% of the target's remaining HP, but no more than 120/240/360, at grades 1, 10, and 20 respectively. Attack and Attack Speed is increased by 1 and 0% at Grade 1 and by 15 and 7.5% at Grade 30.