C button

The C button can refer to buttons on the Nintendo 64 controller or a button on the back of the Wii's Nunchuk auxilliary controller.

Nintendo 64 controller

File:C Buttons(N64).png

The C buttons are four small, yellow buttons found on the top right area of a Nintendo 64 controller. All four buttons activate jumps, and are used to change colors on the character selection screen.

GameCube controller

File:C-Stick(GCN).png

The GameCube controller's equvalent of the N64's C buttons is the C-stick, which is used in Super Smash Bros. Melee to use uncharged smash attacks.

Nunchuk (Wii)

File:C Button(Nunchuk).png

The Nunchuk controller has a C button on its back, which is by default used in Super Smash Bros. Brawl to jump in the Wii remote and Nunchuk control scheme.