GC USB is a controller adapter running the USBRetro firmware that allows you to use just about any USB controller, keyboard, or mouse on an original GameCube console.
Features:
USB-C Input into GameCube Controller Port
Broad USB device support (Generic HID/X-input/D-input/Switch)
USB Controller to GC Controller mode
USB Keyboard/Mouse to GC Controller (both with USB hub)
USB Keyboard to GC Keyboard mode (for Phantasy Star Online)
USB Hub Co-op mode (Multiple controllers combine for one player)
