International Karate Plus is a simple one-on-one karate fighting game.

Every battle takes place in the same location with the same three fighters. If you are one of the top two at the end of a round, you can move on. You can earn six different colors of belts in 25 progressively more difficult rounds. There are 17 different moves.

Every third round, you'll participate in the bonus stage that challenges you to deflect bouncing balls or bombs for additional points.

Two GBAs, a GBA Game Link cable and two Game Paks are required for multiplayer action.