Sony's hoping that with their new subway ad campaign, that people will be going as cuckoo for Loco Roco as the people in this new Japanese CM (below). This new marketing push plasters the walls of the Omote-sando train station and stretches 30 meters long. More interestingly, the ads run the saccharin-sweet theme music from the game. Whether or not this will make the Japanese populace smile gleefully, or get incredibly annoyed, has yet to be discovered.
See also: Awesome new LocoRoco ad