LocoRoco: Midnight Carnival does bring some new things to the table, but it's hard to recommend this since this is still largely the same game as its predecessors. Unless you've played the first two games to death, this would be a nice way to get some more LocoRoco action for $14.99. If you're new and depending on whether you have a PSP Go or not, you may have cheaper options for either of the first two games on UMD while for $5 more, you could get a more content-filled game that comes at the price of using nearly 10 times more space due to its huge file size.
It may be best to just check out the demo for Midnight Carnival to see if you're interested in plucking down any money on a LocoRoco game and then going from there since any of the three games offer a good time.
7.6/10