this is a little mod I whiped up of gunnar hero. the characters have been changed to spongebob (guitar), patrick(drums), and squidward (piano). also a couple texture mods.
you can download my version here -- http://filevip.com/files/7718.vip
or here -- http://filevip.com/download.php?id=gpcOZc
it can also be found here -- http://www.psp-homebrew.eu/hbname.php?id=1242
heres a youtube vid of it -- http://www.youtube.com/watch?v=8tw6lW0irW0