JoJo's Bizarre Adventure All-Star Battle [BLUS31405]

For load the DLC problem just rename the folder NPUB31391_DLC in BLUS31405_DLC.
You should have all the slots unlocked.
Then i think a complete game save is needed to the DLC Characters to appear.

This does not work. The only thing that worked was reducing affinity to 0 in task manager, and after the loading screen, putting it back to all. IF you rename, the game doesn't recognize the dlc, therefore not showing any signs of a problem