Punch is Min Min's held neutral attack, forward tilt, forward smash, forward aerial, back aerial, held neutral special move, and side special move in Super Smash Bros. Ultimate.
Min Min, unlike all other fighters, does not have a conventional neutral or side special move; instead, her moveset has her left ARM mapped to the A button, and her right ARM mapped to the B button. She is able to use both ARMS in either direction, as by flicking the control stick back, she is able to fire an ARM in the opposite direction she is facing. This continues into her aerials, as her respective ARM simply circles around her.
When the special move button is tapped, Min Min instead does the Kung Fu combo, identically to her tapped neutral attack. It is, however, impossible to perform her dash attack with the special move button, instead doing a right arm side tilt.
Kirby's Copy Ability
In contrast to Min Min, Kirby gets a conventional neutral special move as a Copy Ability after copying Min Min. Kirby's leading hand assumes the same form as one of Min Min's ramen ARMS with the Dragon ARM equipped, and he delivers a long-ranged punch, which can fire a laser when the special move button is held down for additional range and power. Unlike Min Min's corresponding move, Kirby's Punch Copy Ability cannot be angled at all, and Kirby is unable to walk forward or backward when using it on the ground, but the move can be B-reversed and wavebounced.
Though ARMS is famous for its specified "thumbs-up grip" Joy-Con controls (where one holds the Joy-Cons upright and moves them forward to punch), the game also allows for button-only controls, where one uses the A and B buttons to control their character's ARMS instead. Controls are customizable in ARMS, but the default scheme has the B button control the left ARM, and the A button control the right; this is reversed in Smash.
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