Dash-canceling

From SmashWiki, the Super Smash Bros. wiki

Dash-Cancelling is performed by entering into a dash and then crouching or jumping, to quickly cancel the animation. After cancelling your dash with a crouch it is possible to do any standing attack. Jumping cancels the dash directly into the jumping animation, which can then be jump-cancelled into a grab or upsmash.

It should be noted that because you can jump with either up or the X and Y button you are able to more easily do a grab or smash.