I wasn't on the receiving end of any tricks yesterday, but I did receive the wonderful treat seen in the photos below.
For those of you who can't read Japanese, the game that serves as the focus of said photos is Character Soft's Hello Kitty World for the Famicom.
More information on this helium-filled platformer can be found in this previous blog post, by the way.
Also, for a few more photos of Hello Kitty World's box and cartridge, check out my Flickr photostream.
Other than all of that, expect a "Great Gaymathon" review of this Japan-only title to be published in the next week or two.