co-op multiplayer games for the gba

Game	Players	Score	Genre *	Release Date	Notes
Altered Beast: Guardian of the Realms	4	63	Action	November 25, 2002	search terms
Batman: Rise of Sin Tzu	2	63	Action	October 27, 2003	confirmed
Defender	2	37	Action	November 17, 2002	search terms
Dragon Ball GT: Transformation	2	69	Action	August 9, 2005	search terms
Fantastic Four	2	57	Action	June 27, 2005	confirmed
Gauntlet: Dark Legacy	1	37	Action	November 26, 2002	confirmed
James Bond 007: Everything or Nothing	2	73	Action	November 17, 2003	confirmed
Sound of Thunder, A	4	65	Action	February 6, 2005	search terms
Teenage Mutant Ninja Turtles	1	71	Action	October 21, 2003	confirmed
Eragon	2	70	Action, Adventure	November 14, 2006	search terms
Lord of the Rings: The Return of the King, The	2	77	Action, Adventure	November 5, 2003	confirmed
Nicktoons Unite!	4	xx	Action, Adventure	October 26, 2005	confirmed
Star Wars Trilogy: Apprentice of the Force	2	60	Action, Adventure	September 20, 2004	search terms
Shrek 2	1	72	Action, Adventure, Platform	May 4, 2004	confirmed
Naruto: Ninja Council 2	4	55	Action, Fighting	October 4, 2006	search terms
Naruto: Saikyo Ninja Daikesshu 2	4		Action, Fighting	April 29, 2004	search terms
River City Ransom EX	2	75	Action, Fighting, Role-Playing Game	May 25, 2004	search terms
Ice Climber (Classic NES Series)	2	61	Action, Platform	June 7, 2004	search terms
Over the Hedge	2	49	Action, Platform	May 9, 2006	confirmed
Sonic Advance 3	4	79	Action, Platform	June 7, 2004	search terms
Tak: The Great Juju Challenge	2	52	Action, Platform	September 19, 2005	confirmed
Shining Soul II	4	74	Action, Role-Playing Game	April 20, 2004	search terms
CT Special Forces	2	71	Action, Shooter, Platform	December 31, 2003	search terms
Barnyard	4	56	Adventure	August 1, 2006	search terms
Legend Of Zelda: A Link to the Past, The	4	95	Adventure	December 2, 2002	search terms
Teenage Mutant Ninja Turtles 2: Battle Nexus	4	65	Fighting, Action	October 19, 2004	confirmed
SpongeBob SquarePants: Lights, Camera, Pants!	4	xx	Party	October 21, 2005	confirmed
ZooCube	2	71	Puzzle	May 15, 2002	confirmed
Starsky & Hutch	1	xx	Racing, Driving	September 15, 2004	confirmed
Baldur's Gate: Dark Alliance	1	76	Role-Playing Game	January 13, 2004	confirmed
Lufia: The Ruins of Lore	4	76	Role-Playing Game	May 6, 2003	search terms
Sims 2, The	2	58	Simulation	October 24, 2005	confirmed
Rainbow Six: Rogue Spear	4	76	Tactical Shooter, Action	March 15, 2002	search terms
Harry Potter and the Goblet of Fire	3	71	Third-Person Action, Adventure	November 8, 2005	confirmed
LEGO Star Wars	2	75	Third-Person Action, Adventure	March 29, 2005	confirmed
35 games

This site is built by a ugly perl script that crawls metacritic. I'm not affiliated with them in any way. I just find their layout to be clean and easy to parse, and their game database seems to be very complete. Someday, I hope to discontinue this service when a major game site treats co-op multiplayer as a searchable game feature!