The Z Button refers to the long, purple button at the top right corner of a GameCube controller, the rectangular, gray trigger located on the back of a Nintendo 64 controller, or the rectangular, white button on the back of the Nunchuk controller. It can also refer to the two circular white buttons on the top of the Classic Controller called the ZL and ZR buttons. There is no Z button on the Wii Remote. On the GameCube and Classic controllers, the purpose of the Z button is to grab opponents. On the Nunchuk and Nintendo 64 Controllers, the Z button is used to shield a character.