Swing Bar Long is the 18th Expert floor in Monkey Ball and Super Monkey Ball, and the 27th Expert stage in Super Monkey Ball Deluxe. It also appears as the 137th Ultimate stage with continues, and the 177th without.
It has two platforms, one with the start and the other from the goal, connected by a long platform the same width as the other two. The middle platform will tilt, then tilt in the opposite direction, and so on. This makes it difficult for the player to have enough momentum to cross.