Creepy-Crawly Bowser Tower
From the Super Mario Wiki, the Mario encyclopedia
The level consists of a long bridge branching off the starting ground. There is a ? Block containing a Super Mushroom near the start. A few blocks underneath the bridge is a long Conveyor Belt with a tower of three Bowsers stacked on top of a Wiggler. The Wiggler is positioned on the Conveyor Belt. The tower is high enough that the three Bowsers end up above the bridge, but still move along the Conveyor Belt. In this autoscrolling level, Mario has to dodge the Bowsers' fireballs until the end of the bridge and the Conveyor Belt. Once the tower reaches that point, the tower will fall and allow Mario to reach the goal.
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