A polished and fun trivia game for Wii we made at Planet Moon, Smarty Pants was also notable for being the first non-Nintendo published game to be allowed to use Mii's to represent the players.  I worked on this aspect directly and was an interesting view into how Nintendo viewed the IP protection they felt was key to the Miis.  

Smarty Pants remains one of the most successful games that we made at Planet Moon as well, with small residual royalty checks still coming in many years later.