psnprofile看到的,似乎不需要一轮内三个都全收集;分开算也行,但需要自己记住。 The wording on this one is somewhat confusing so time to clear it up. You don't need to earn the "Perfect!" rank for LocoRoco, Pickories, and hidden MuiMui on every stage all at once on each level. You can get the "Perfect!" rank for LocoRoco in one run in a single level, then get the "Perfect!" rank for Pickories in another run on the same level, and finally get the "Perfect!" rank for hidden MuiMui in the last run on the same level as your two previous runs.
Getting the "Perfect!" rank for all these collectibles can be pretty tricky at times. If you fail according to the level's end results screen or notice you didn't get a Pickory, a MuiMui, or a LocoRoco mid-level, just restart the level and try again, you'll get it eventually.
Note: Pickories aren't tracked by the game whereas LocoRocos and hidden MuiMui are, so get a sheet of paper and check each level you get all the Pickories on.