"Midnight Carnival" is more than just the name of our favorite Rock/Metal/Glam band from Sugarland, Texas. It's also, according to Famitsu by way of IGN, the subtitle of a new LocoRoco game available for download only on the PSP this November in Japan (the same day the PSP Go arrives there). Details are scarce, but you can expect a new "Boing" move and more difficult stages with an action focus.
Though LocoRoco Midnight Carnival hasn't yet been announced in North America, we have to imagine it's a safe bet. It's not as if there's a whole lot of localization to be done for singing balls of goo, right?