By megadrive, did you mean
this? If so, that is only a easy-to-install connector for the wasp to a gamecube. Also, the xeno is only a modchip for the drive, it allows you to put burned games into the drive, not play ISOs, and the Wiikey fusion is no longer in production, so the one you'd want is the WASP, which you can get
here whenever they get more stock (the store is run by one of our own members,
@megalomaniac ).