SSBU/Kazuya/Techniques

Execution
Press and forward on the control stick. Press and release C-Stick down. Release forward on the control stick. Repeat to do constant Crouch Dashes forward.

Application
This is the easiest way to do Crouch Dash on a Gamecube and Pro controller. On box controllers there are easier ways, but those ways depend on the control layout used.

Downsides
Easy to misinput DTilt which is pretty laggy if not canceled.