Hamtaro Ham-Ham Challenge

Tottoko Hamtaro Nazonazo Q: Kumonoue no? Shiro is a Nintendo DS video game by AlphaDream and Nintendo. It was released in December of 2005, around the same time as another AlphaDream title, Mario & Luigi: Partners in Time. The game takes place after Princess Hatena is kidnapped by a gang of thugs on the day she was supposed to become queen.

Gameplay
In the game, you'll answer riddles that are given to the player. In order to beat the game completely, you'll have to beat 450 riddles. The riddles were made not only by Nintendo, but also by contributors who visited NCL's website. After you complete a riddle, you'll go onto the next one.