Fire Bar

Firebars are rotating rods made of fireballs first appearing in Super Mario Bros.. They are found in numerous titles throughout the Mario series. They are generally found in fortresses and act as dangerous obstacles that Mario must avoid in order to reach the goal.

Firebars were also given notable appearances in certain castles of Super Mario World 2: Yoshi's Island, which depicted them as swinging three-dimensionally. A three-dimensional Firebar depicted with eyes also appeared in Waluigi Stadium and Bowser's Castle course of Mario Kart: Double Dash!!.

''Super Mario Bros.
Firebars make their debut in Super Mario Bros.. Although they are not a living enemy, they rotate around a block in a clockwise or counter-clockwise direction. If Mario or Luigi makes contact with one he will take damage from the fire. In later games, they are replaced with similar-acting enemies such as Roto-Discs and Ball 'n' Chains.

''Super Mario Bros.: The Lost Levels
Firebars also appear in Super Mario Bros.: The Lost Levels. As in Super Mario Bros., they spin around in a similar fashion. In some castles, there are huge firebars with at least 14 Fireballs, unlike the normal Firebars, which usually have 6 fireballs.

''Super Mario 64
In Super Mario 64, they appear for the first time in full 3D. They only appear in Lethal Lava Land, and do not deviate from their standard behavior.

New Super Mario Bros.
In New Super Mario Bros., Firebars first appear in World 6-4. They also appear in the second tower of World 8, and a lone one appears in Bowser's Castle.

''Super Mario Galaxy
In Super Mario Galaxy, they appear as obstacles in a number of different galaxies, including the Sling Pod Galaxy, the Toy Time Galaxy, Bowser's Star Reactor, and Bowser's Galaxy Reactor.

''New Super Mario Bros. Wii
In New Super Mario Bros. Wii, Firebars only appear in the tower and castle of World 8.

''Super Mario Galaxy 2
In Super Mario Galaxy 2, the Firebars' function is the same as in Super Mario Galaxy. They mainly appear in Bowser Jr.'s Fiery Flotilla, Bowser's Gravity Gauntlet, the Slipsand Galaxy, and Bowser's Galaxy Generator. It is also of note that rotating Firebars are used during the boss battle with Bowser Jr.'s Boomsday Machine in Bowser Jr.'s Boom Bunker, where they are integrated directly into the Boomsday Machine.

''Super Mario 3D Land
They also reappear in this game with the same tactics as before.

''Paper Mario
In Paper Mario, the Firebars reappear in Koopa Bros. Fortress and Mt. Lavalava; this time they swing sideways. They also swing either clockwise or counter-clockwise. If Mario touches one, he loses some HP, but if Mario's partner touches one, nothing happens. Jumping over one of these Firebars causes it to swing faster. If Mario dodges one ten times, it will vanish and drop a number of coins. This is the first appearance in which Firebars can be destroyed.

''Paper Mario: The Thousand-Year Door
In Paper Mario: The Thousand-Year Door, they reappear in Bowser's third platform level. Here, they can be defeated by Bowser's firebreath. If Bowser come in contact with the fireballs, they can either decrease his size or defeat him (if he's tiny). They also appear in the Palace of Shadow and have the same behavior as they do in Paper Mario.

''Super Paper Mario
Firebars reapperar in Super Paper Mario. In the game, they act in a similar fashion as in Super Mario Bros. and appear in Chapter 1-4 and 8-2.

Yoshi series
Firebars appear in Super Mario World 2: Yoshi's Island. They appear in certain forts and castles. They are usually depicted as swinging three-dimensionally. They also reappear in Yoshi's Island DS.

Trivia

 * Firebars were featured as collectible items in Animal Crossing: Wild World and Animal Crossing: City Folk. When it is set down, it plays the castle music of Super Mario Bros. while the Firebar spins.
 * In The Legend Of Zelda: A Link to the Past, Firebars spin on the ground.
 * According to Satoru Iwata, "...firebars, which appear in Super Mario Bros., had also been used early on in development of The Legend of Zelda: A Link to the Past."
 * Firebars are the only enemies in Super Mario Bros. to not return in Super Mario Bros. 3.