Generic PSX to Gamecube Joypad Converter part 1 - Compatibility - YouTube
Does anyone know about this PS2 controller Adapter that lets you use Gamecube and Xbox Controllers on a PS2? Found it at a local game store - 9GAG
Yamaha Controller Converter use Playstation 2 Controller on Nintendo GameCube | eBay
3 in 1 Converter Playstation 2 to PC USB, Gamecube and Xbox Adapter Review HD1080p - YouTube
Amazon.com: Tangxi Controller to USB Adapter, PS1/PS2 Converter Wired PS3/PC Controller Wireless for Sony's PS1/PS2/PS3 Console and Windowns PC : Video Games
raphnet. - Gamecube to USB adapter - V3
Universal PS2™ Controller Adapter for GameCube, Xbox, Windows
PS2 to GameCube Controller Adapter - How well does it work? | GBAtemp.net - The Independent Video Game Community
Anyone play GameCube with a PS2 controller? : r/Gamecube
$5.24 Playstation 2 to Wii & GameCube controller adapter - SuperGadgets.ca
GameCube/Wii JoyBox (PS2 controller or Dance Pad to GameCube/Wii) - FutureMax