Swinging Bars of Doom

Swinging Bars of Doom is an e-Reader level for Super Mario Advance 4: Super Mario Bros. 3. It is Level Card #09, and it can be found in Series 2. The level contains four Advance Coins and no e-Coins.

The enemies in this level include Boos, Thwomps, Thwimps, Piranha Plants, Podoboos, Hotheads, and Bony Beetles. There are some spots where the player must jump over lava, but for the most part, they must avoid Firebars.

The ending of this level, however, is what really sets it apart from other fortresses. The player must fight two Boom Booms, one of which gets flight powers after a hit, and the other has the power to jump.