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Smash Hero
Have you ever seen Snake do a sliding Usmash aka Mortar Slide? That's a DACUS.What is DACUS?
It stands for Dash Attack Canceled Up Smash. What happens is...well, you cancel your dash attack into an up smash. IIRC, it's done by running, hitting c-stick down to start the dash attack, and then hitting up on the control stick and the grab button at the same time to cancel it into an up smash. The timing for it and the distance crossed varies from character to character. And added benefit is that characters can pick up items as they would have during a dash attack.