Spiral Bridge is the 21st Expert stage in Super Monkey Ball 2, and the 39th Expert stage in Super Monkey Ball Deluxe. It also appears as the 149th Ultimate stage with continues, and the 189th without.
This stage features a circular platform with a spinning spiral bridge. On the top, there is an L-shaped platform with the goal on it.
This stage is usually considered pretty hard for most people, despite it being considered one of the easiest Expert stages with a difficulty rating of 4/10. Walk on the spiral until you reach the top. Try to stay as much as possible in the center, and roll up with enough speed to avoid falling off and making it up successfully. Wait until the spiral connects with the goal platform. Then, get on the platform, and try to curl down-right on the control stick to stay on the platform successfully. Then, roll into the goal.