Bonus Challenges are Bonus Games in Super Mario World 2: Yoshi's Island, its remake, and Yoshi's Island DS. When a Yoshi reaches the Goal Ring and the roulette lands on a Flower, then a Bonus Challenge can be instantly played. Bonus Challenges can also be unlocked after getting 800 points in a world to be played anytime. In the two earlier games if the player flips all the panels without a miss, Kamek will retreat from the panel he was hidden under while revealing a 10-up.
The list of Bonus Challenges are below.