All-Star Baseball 2001 is a baseball simulation game for the Game Boy Color, released in the USA. It's a follow-up to previous All-Star Baseball entries, and gameplay most likely involves pitching, batting, and fielding mechanics simplified for the handheld platform.  Details on developers and publishers would add to the introduction's completeness. 

All-Star Baseball 2001 (USA)

Aliens - Thanatos Encounter (USA, Europe)