The Fiery Stronghold

The Fiery Stronghold is the only level in Bowser's Star Reactor. It's the first Bowser level, with the fly-in foreshadowing the second Bowser Jr. level, Sinking the Airships.

The individual level world records are 2:36.500 for Mario by Tiber and 2:40.367 for Luigi by Steakanator.