SR Button in the bottom-left and top right part of diagram.

The SR button refers to the right shoulder button on both individual Joy-Con when they are detached from the Nintendo Switch. Like the SL button, it matches the color of the Joy-Con. The wrist strap that comes with the Joy-Con can be attached to make the button easier to press.

Overview

When using dual Joy-Con, it serves no purpose and is completely inaccessible when the Switch is in Handheld mode. When using a single Joy-Con, it serves as a substitute for the R button, acting as a shoulder trigger. In Ultimate, it is used for shielding, much like how the R button is used for shielding in Super Smash Bros. for Nintendo 3DS.

In Ultimate, the SR button can be customized in the controls menu to perform other functions. Nintendo Switch system version 10.0.0 introduced the ability to map the functionality of any button to any other button from the console options menu, further diversifying how the SR button can be used in Ultimate.

Controllers and buttons
Nintendo 64 controller
Nintendo GameCube controller
Wii Remote (and Nunchuk)
Classic Controller	LR
Nintendo 3DS
Wii U GamePad / Wii U Pro Controller	LR
Joy-Con / Joy-Con 2	/ GL button GR button
Nintendo Switch Pro Controller / Nintendo Switch 2 Pro Controller	LR / GL button GR button
Third-party controllers	Hori Mini Pad · Arcade controller · Keyboard
Other	Controls · Smash Controller · Controller modification

• Controller buttons
• Game controls