Coaster is the 4th level of Advanced in Super Monkey Ball 2 (24th in Super Monkey Ball Deluxe), World 2-4 of Story Mode in Super Monkey Ball 2 (World 2-20 in Super Monkey Ball Deluxe), and the 84th level of Ultimate without continues (64th with continues).
This stage is a large, coiled tube with holes cut out of its sides. At the end of the tube are two platforms, one with the width of the tube and one with half this width. The goal is at the end. There are some banana bunches a short distance from the goal, but you must pass through the goal at a high velocity to get to them.
To get the Goal, head into the opening of the coaster. After entering, do not move the monkey forward. Wait to reach the end, and then adjust the direction in which you are going, so you can run into the goal.