Twin Attacker is the 21st Expert floor in Monkey Ball and Super Monkey Ball, and the 29th Expert stage in Super Monkey Ball Deluxe. It also appears as the 139th Ultimate stage with continues, and the 179th without.
The level is made up of two opposing large platforms, one with the goal on it, and one where you start. In between these platforms is a thin (two half squares wide) strip. There are two walls on either side of the strip that constantly move back and forth so that one of the walls is always on the edge of the strip.
To get to the goal, you have to move along the strip in the middle without getting bumped off by the "twin attackers". To do this, you have to roll along the opposite square from where the current attacker is. You will need to switch squares at least twice as the attackers switch sides.
- This floor has the highest difficulty rating of any floor in the Desert world.