In this Bonus Stage, the player is sent to area containing Bananas. As the name suggests, the player's objective is to simply collect all the Bananas in the area. Other items besides Bananas may also be seen here, such as Tires to help the player reach the Bananas.
The player does not need to collect all the Bananas, though. They could leave the Bonus Stage without collecting any Bananas, and the game's percentage would not be affected.
Below is a list of stages where the Collect the Bananas! Bonus Stage appears.