Step One: You should arrive at this scene                Step Two: ...the barrel is left of the 'O' and
at sometime during the level. Do not shoot               blast out of the barrel. It will send you...
towards the 'O' and the next blast barrel.
Instead, wait until...

Step Three: ...to a hidden barrel. Blast into the wall and you will access the bonus room!
 

Second Bonus Room
 
 
 
 

               
Step One: Just after the halfway mark, you                Step Two: ...jump to the left to the platform.
will find you way to this scene. Cartwheel                  Then...
jump with Diddy and kill the bouncing
Kremling on the right of the picture. Once
you do that, pick up the TNT barrel and...

Step Three: ...break open the wall to access the bonus room!
 

Next Level