More information has been revealed about the recently teased Gamecube controller support for the Wii U version of Super Smash Bros. For starters, the Gamecube Controller Adapter for the Wii U will retail at $19.99 USD. Also, the Gamecube adapter will support up to four controllers, including the Wavebird. Also, the Smash Bros. themed Gamecube controller will retail at $29.99 USD. Finally, there wi...