Allstar Baseball 2004 for the Nintendo Game Boy Advance is a sports simulation game that allows players to experience the excitement of professional baseball. Featuring a comprehensive roster of real Major League Baseball teams and players from the 2003 season, the game offers various modes such as Exhibition, Season, and Home Run Derby. With intuitive controls and gameplay that captures the nuances of the sport, players can pitch, bat, field, and run the bases. Its portable format makes it easy for baseball fans to enjoy a full-fledged baseball experience on the go.