Bonus Bumpy is a bonus stage and the 30th Expert floor in Monkey Ball and Super Monkey Ball, as well as the 10th Expert stage in Super Monkey Ball Deluxe. It also appears as the 120th Ultimate stage with continues, and the 160th without.
This bonus stage is a very large square floor with a 10 by 10 grid of smaller elevated squares on it. Half of these smaller squares have bananas on them, summing op to a total of 50 bananas.
Perfect Score Tutorial
The easiest way to clear this bonus stage is by following a snake pattern. First, you'll want to collect the bananas on the first row, so immediately go to your left or to your right. After the first row has been cleared, turn around, move the second row and collect all bananas in one go. Then, turn around again and go to the third row. Repeat this process until all bananas are collected.