GameCube Controller Compatibility with New Super Mario Bros. Wii

No, you cannot use a GameCube controller with New Super Mario Bros. Wii.

Why It's Not Supported

• Wii Remote Mandatory: The game is designed around the Wii Remote's pointer (for menus/star bits) and motion controls (shake for spin jump, tilt for platforms).
• No Native GCN Support in Wii Mode: The Wii's backward compatibility mode (for GCN games) disables Wii Remotes. Conversely, Wii games cannot access the GameCube controller ports. The hardware paths are mutually exclusive.

Supported Controllers

• Wii Remote (Solo): Hold sideways (classic NES style) or upright + Nunchuk.
• Wii Remote + Nunchuk: Analog stick movement, shake spin jump, pointer for star bits.
• Classic Controller / Classic Controller Pro: Plugs into Wii Remote. Full button layout (dual sticks, triggers, D-pad). Best traditional feel. No pointer function (star bits auto-collected or via Remote).

Recommendation: Use a Classic Controller Pro for the closest GameCube-like experience (analog stick, shoulder buttons, comfortable grip) while maintaining full compatibility.