Sooooo I happened to notice that I'd f*cked up the partitioning on my 3ds sd card and so I backed it up and fixed the partitioning. HOWEVER the backup got messed up somehow and Smash got all kinds of messed up. The eShop says it's downloaded, The icon but not the top screen label shows up, and it won't launch, [however showing me my spotpass and streetpass blinking lights on the icon] and once i launch an app and return to the menu it's gone. Data management reads it as ~6 apps with no name...
Smash save file recovery [experienced users needed, HELP!]
Smash save file recovery [experienced users needed, HELP!]