Astro Boy: Omega Factor Classic
The Matrix has 50 beat 'em ups on file for the Game Boy Advance, released between 2001–2007. 15 of them support multiplayer, including 10 with co-op. They're ranked below by legacy score, so the games that shaped the genre on the GBA come first, with lesser-known picks further down.
Beat 'em ups send you down scrolling streets fighting waves of thugs with punches, kicks, throws and grabbed weapons. Most can be finished in a single sitting and shine with a second player.
Typical commitment: quick session (under an hour, or endless arcade fun). Tip: Avoid getting surrounded: keep enemies on one side of you and save your special attacks for crowds. Bring a friend if the game supports co-op.