What is the Z button on Switch?

On the Switch Pro, Nunchuk and Nintendo 64 controllers, the Z button is used to shield. When using a single Joy-Con in SSBU, the ZL or ZR button (depending on which Joy-Con is used) is not set to any action by default.

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Controllers and buttons
Other	Controller modification

Contents

How do you use a 2 player switch controller?

From the HOME Menu, select Controllers, then Change Grip and Order. While the following screen is displayed, press and hold down the SYNC Button for at least one second on the controller you wish to pair. Once paired, the player LED(s) corresponding to the controller number will remain lit.

How do I use both Joy-Cons as one controller?

How do you slide on a Nintendo Switch controller?

What is the Z button on Switch? – Related Questions

Why won’t my switch controllers connect?

Firmly reattach both controllers to the console by snapping them securely into place. If this doesn’t work, try detaching and reconnecting the controllers again. If the controllers still won’t connect, if possible, try attaching a different controller to see if the one you’re using is broken.