Evidently, the downloadable content for the popular story-based puzzler has a set number of puzzles (162) built into the game, which are unlocked by downloading certain codes.

GoNintendo discovered a supposedly complete list of the game's riddles to back up this claim. You can check out every single puzzle featured in the game, and even choose to sneak a peek at every solution as well -- an action we can't help but feel would be frowned upon by the eponymous scholar and his pint-sized associate.

chautemoc via nintendo-ds.dcemu.co.uk »