Dash dance

Tags: basics, movement

Dash Dancing is the basis for all of your ground movement. It is performed simply by tapping left and right repeatedly on the analog stick while grounded. If your taps are done shortly after each dash and before the maximum dash distance is reached, then the dash animation will be canceled by a dash in the opposite direction. Dash Dancing is maintaining this state of constant dashing.
— melee.guru

Fox's dash speed is very quick, making his dashdance very threatening and unpredictable. While anyone can learn to perform the motion in just a few minutes, understanding the purpose and having full control over it takes much more. It is the quintessential 'low skill floor, high skill ceiling' technique.