Game & Watch classic hidden in DS dictionary

Nintendo has included at least one custom definition in Rakubiki Jiten, its Japanese-English dictionary utility for DS. When you enter the word "ball," the software offers up two translations. Selecting the grey-colored option launches the original Game & Watch title, known simply as Ball. The game, a primitive juggling act, can be played on the touch-screen for a quick diversion from your studies. Wonder what else Nintendo packed into this seemingly drab language tool...