Secret Course 26
From the Super Mario Wiki
The course starts out with a green Koopa Troopa shell that must be kicked into several enemies including Big Spinies and more green Koopa Troopas. There is a long row of Long Jump Blocks along the way where the first three Bonus Medals can be found. The player must then kick another green Koopa Troopa shell and run along a few sloped surfaces along with more sets of Long Jump Blocks. The fourth Bonus Medal is found on the second slope and can be found by kicking the shell into it. The fifth and final Bonus Medal is found right before the Goal Pole and can be grabbed by jumping off the set of Long Jump blocks right before it.