How to Reset the L and R Control Sticks to a Neutral Position on the Wii U GamePad
What to do:
The neutral position of the control sticks can be incorrectly set if you move them during the following actions:
Turning the console on
Launching software
Quitting software and returning to the Wii U Menu
Allow the control sticks to return to a neutral untouched position.
Simultaneously hold down the A Button, B Button, + Button, and - Button for at least 3 seconds.