The first completely new installment of the series since Wagan Paradise, Hirameki Action: Chibikko Wagan no Ōkina Bōken ("Flashing Action: The Big Adventure of Little Wagan") was released for the Nintendo DS on January 29, 2009. The action segments are not much different from previous installments, but the game now includes puzzles which utilizes the DS's touch screen. The game's soundtrack consists of new versions of the previous games' music. Wagan and Dr. Devil are featured in this game, along with several new characters.
Source: Wikipedia, "Wagan Land", available under the CC-BY-SA License.