Super Monkey Ball Jr. is set in a world based on the GameCube series, where you control a 3D style arenas with varying degrees of difficulty and objectives. Your goal is to navigate your little monkey, inside a ball, through each arena by moving it around and completing tasks such as collecting items or reaching the finish line within a certain time limit.
The game features a mix of single player puzzle experience, including over 60 arenas, and multiplayer mini-games for up to four players. You can unlock these mini-games in the single player mode by completing the puzzle experience. Options include monkey bowling, monkey fight, or an 18 hole mini golf challenge.
Super Monkey Ball Jr. was released on the GameBoy Advance in January 2002.