Cho Aniki Zero (零・超兄貴, Zero Chō Aniki, lit. "Zero Super Big Brother") is a horizontally scrolling shoot 'em up, the latest game in the Cho Aniki series. It was published in Japan by GungHo Works on 19 March 2009 for the PlayStation Portable. The game was published in North America by Aksys Games on 25 March 2010 as a digital download exclusive for the PSP, with the full title of Cho Aniki Zero: Muscle Brothers.