Hi Hamtaro! Little Hamsters Big Adventure(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!Tottoko Hamutarou Haai! Hamuchanzu no Hamuhamu Charenji! Atsumare Haai!, lit. "Tottoko Hamtaro, Okay! The Hamchans' Ham-Ham Challenge! Let's Get Together, Okay!), known as Hi! Hamtaro Ham-Ham Challenge in North America, is a puzzle game for the Nintendo DS made by AlphaDream and published by Marvelous in Japan, 505 Games in PAL regions, and Natsume in North America. It is a sequel to Hamtaro: Ham-Hams Unite!, Hamtaro: Ham-Ham Heartbreak, Hamtaro: Rainbow Rescue (which was never released in America), Hamtaro: Ham-Ham Games, and the Japan-only Tottoko Hamtaro Nazonazo Q: Question Castle in the Clouds, and is based on the anime series Hamtaro. The game was released in Japan on March 15, 2007, in Europe on May 23