Thanks to this image, courtesy of YouTuber Haedox (@Haedox on Twitter), we now know that review copies for upcoming Wii U title Star Fox Zero have begun being distributed. The game launches worldwide on April 22. It is fair to assume that the game has gone gold. Interestingly, side-game Star Fox Guard appears to be on a disc of its own. Previously, it was unknown whether Guard would have a separate disc or be part of the Star Fox Zero game disc.