Dodecagon is the 6th Expert floor in Monkey Ball and Super Monkey Ball, and the 5th Expert stage in Super Monkey Ball Deluxe. It also appears as the 115th Ultimate stage with continues, and the 155th without.
It's not really a dodecagon. It's just a group of small moving blocks. These blocks have holes in it. They move and disassemble into smaller blocks. Four bananas are placed inside the blocks. There are L shaped platforms with a goal on one of it. A banana bunch is placed on 2 of them.
To get to the goal, move to the small blocks. Wait until it assembles, and run into the other blocks. Do not move fast. Get into another L platform. After that, wait until the squares disassemble, and stay there, and run into the goal after it assembles.
- The blocks resemble part of the Sierpiński carpet.