Hi! Hamtaro Ham-Ham Challenge

'Hi! Hamtaro Ham-Ham Challenge' (とっとこハム太郎 は～い! ハムちゃんずのハムハムチャレンジ! あつまれは～い!), is a puzzle game published by Marvelous in Japan, 505 Games in PAL regions, and Natsume in North America. The game was released in Japan on March 15, 2007, in Europe on May 23, 2008 and in North America on September 23, 2008.

Gameplay
The player uses Hamtaro to explore the area play a variety of fun and educational brain-training games designed for elementary children. Parents can monitor their children's progress and even reward them with items based on their scores.

Trivia

 * The Japanese release of the game had another version of Maxwell's minigame, where one has to correctly check the spelling of certain words by one of the Ham-Hams. This wasn't included in the international releases for an unknown reason; likely because of the coding.
 * Also, whereas the original release had the Ham-Hams speak in fluental Japanese, they were speaking gibberish in both the US and EU releases. It is likely that the developers couldn't get the voice cast from the English dub to reprise their roles.
 * Crave Entertainment was originally going to publish the U.S. release of the game.