Yeah, as previously stated, the main issue with the GameBoy Player is that the little box that you attach to the bottom of the GameCube actually contains the basic components of a GameBoy Advanced for the purpose of emulating the hardware (NOT using software to replicate it), which neither the Wii nor the Wii U contain. So creating a GameBoy Player that is compatible with Nintendont would essentially require building a GameBoy emulator from the ground up, which is not only impractical, but unnecessary.