Magus420
Smash Master
If you press forward to dash and hit Z at the same time you do a standing grab. Stand still and pause the game, hold forward and Z, and then unpause. You'll do a standing grab. The dash needs to register first before you press Z.I dash and hit z at the same time. I should record the difference in the animations..
The dust cloud you described before is part of the dash animation but it doesn't appear immediately. If you interrupt the dash early enough it's before that happens which is why you wouldn't see it.