ChuChu Rocket!

 is a puzzle game developed by Sonic Team and published by Sega on November 11, 1999 in Japan, on March 7, 2000 in North America and on June 9, 2000 in Europe for the Sega Dreamcast. Three additional content packs were released through the SegaNet service.

How to obtain
See Transfer Saves Between Dreamcast and PC.