GIF needed
Much like Jump cancel up-smash, you can grab from jumpsquat. A jump cancel grab, therefore, is executed by pressing jump, then Z within two frames.
— But one can already dash grab; what good is it, then? you might say.
— Indeed, Aloysius says, but a grab from jumpsquat is a standing grab. It comes out quicker – frame 7 instead of frame 12 – and is less laggy.
The difference between a jump cancel grab and a dash grab is significant, so don't get complacent. It is also necessary for chaingrabbing and will make Waveshine to grab combos much easier.