Go to where the four barrels are. Kill whoever is on them. Stand on the first barrel from the left and when you are on it (you need both Diddy and his girlfriend) press A. If you have Diddy playing and his girlfriend following, Diddy's girlfriend will hop onto Diddy's back. If you have Diddy's girlfriend playing and Diddy following her, Diddy will hop onto his girlfriend. Then, press B and quickly press Up + Y. You will go to a totally different place and find bananas. You can take them if desired. Go through the hole in the right side to reach the end of the level. Jump on the target to complete the level.

Team throw upwards above the first bonus room, which is on top of the first set of barrels

Notice the barrels stacked up on each other. At the top, you will see a bonus barrel. Have Dixie and Diddy stand on top of each other. Throw the top monkey up to the right of the bonus barrel. This is a shortcut to the end of the level.