Swinging Bars of Doom

Swinging Bars of Doom is an e-Reader level for Super Mario Advance 4: Super Mario Bros. 3. The level contains four Advance Coins. Its difficulty rating is ★★★★☆. This card was released as part of series 1 in Japan and series 2 in North America. The keyart for the former depicts Morton Koopa Jr., while the latter depicts Roy Koopa.

Level synopsis
The enemies in this level include Boos, Thwomps, Thwimps, Piranha Plants, Podoboos, Li'l Sparkies, and Bony Beetles. There are some spots where the player must jump over lava, but for the most part, they must simply avoid Fire Bars.

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

New level elements

 * Thwimp
 * Bony Beetle
 * Fire Bar
 * One-Way Flippers
 * Lil' Sparky
 * Two Boom Booms