That's the JRPG "SeGaGaGa" where your goal is to save SEGA from going bankrupt and that shooting game stage is at the very end of the game. So unless you have a good knowledge of the Japanese language you probably aren't gonna get to play that part of the game. I haven't seen a save for that point in the game anywhere online (then again I haven't checked really either, since I'm not sure how you'd get the save onto your vmu, maybe by burning a cd-r or something?).