Instructions
Enter World 1, Stage 3 and hit the "?" box to have Mario team up with Yoshi. Play just past the mid-level save point and jump on the small ledge at the top of the screen. Enter the floating cave-like mass.
Perform a double-jump to have Yoshi launch Mario above the ledge. Follow the path above the ledge and jump on the flagpole to unlock a cannon that will warp you to World 5.
Enter World 2-6 and get a helicopter hat from one of the many flying enemies. Use the hat to fly just past the flickering coins and enter the red pipe above. Follow the path and jump across the mushroom platforms to unlock the second World 5 warp cannon.
Enter the World 3 Haunted Mansion. Go right and you'll be in front of an invisible wall. Push through the door in the wall. Climb the poles and enter the door at the top.
Walk across the rope and fall onto one of the moving yellow platforms. Ride the platform and jump down onto the box-like platform, which you fall through. Enter the secret door at the bottom.
Dodge the Boos and enter the door at the bottom floor. Jump on the flagpole to unlock a cannon that will warp you to World 6.
Enter the World 4 Fortress. Get across the treadmills and go through the pipe. Wait for two gray blocks to drop and immediately jump onto the second block and dash through the wall.
Enter the pipe and get across the treadmills. Jump on the flagpole to unlock the second World 6 warp cannon.
Enter the World 5 Haunted Mansion. Approach the door at the bottom right, but go left through the secret wall and enter the secret door.
Jump across the moving platforms and enter the door to the right. Jump through the wheel of Boos and onto the flagpole to unlock a cannon that will warp you to World 8.
Enter World 6-6. Get to the mid-level save point and ride the raft until you reach a pair of Fire Hammer Brothers. Jump onto the platform and enter the red pipe.
Enter the cave and slip into another red pipe. Jump on the flagpole to unlock the second World 8 warp cannon.