From the Super Mario Wiki
The Fire Bro (or Fire Brother) used to be a rare variety of Hammer Bro, but are more commonly employed in levels more than any of its brethren, making it a semi-common enemy in the present. Instead of throwing Hammers like their relatives, Fire Bros. have the unique ability to throw (originally spit) Fireballs. These fireballs move very fast. Ice Bros. can be considered their polar opposites, as an Ice Flower is the polar opposite of a Fire Flower.
Super Mario series
Super Mario Bros. 3
Fire Bros. first appear in Super Mario Bros. 3 as rare enemies. In fact, only three appear in the entire game. Two appear in the Desert Land, after breaking a boulder in the desert with a hammer. Once they are defeated, Mario/Luigi will obtain a Warp Whistle. Whether defeated or not, it is mentioned by Princess Peach's letter as an unidentified thief of the whistle that escaped to the east of the desert. One also appears in the first Hand Trap level of Dark Land.
On the map, their map icon was a Hammer Bro in the original NES version. In the SNES remake for Super Mario All-Stars, their map icon was adjusted to resemble an actual Fire Bro from the game. This adjustment remained intact for Super Mario Advance 4: Super Mario Bros. 3.
As well as that, Fire Bros. also appear in a few unreleased World-e levels; Hidden Koopa Castle, Don't Mess with the Koopalings!, and Koopa's Airship:Part 2.
New Super Mario Bros.
Fire Bros. reappear in New Super Mario Bros. as very rare enemies. Only a single pair is found in World 8-7, right after the checkpoint. They still use the same attacks they had in the previous games they appeared in. In this game, Fire Bros. throw their fireballs with the hand, just like Fire Mario, rather than spitting them.
New Super Mario Bros. Wii
Fire Bros. reappear in New Super Mario Bros. Wii, having the same attacks from New Super Mario Bros. Like in that game, these Fire Bros. throw their fireballs instead of spitting them out of their mouths. From being rare in the past games, they are semi-common in this game. They are more common than the Hammer Bros., the latter being common in the past games; they may also appear as 'guardians' at the end of their levels.
A single Fire Bro is near the end of World 2-3. Three Fire Bros. are found in World 3-4: one at the start, another near halfway of the stage, and a third near the end. In World 6-6, the same number of Fire Bros. guard both the normal and alternate exits. In their last appearance in World 9-7, they appear as a duo on platforms near the end of the level. They are mostly teamed up with Venus Fire Traps.
New Super Mario Bros. 2
Fire Bros. also appear in New Super Mario Bros. 2. They are found in World 6-3 and behave the same way they did in the previous New Super Mario Bros. games. Fire Bros. can also be turned gold when Mario touches a Gold Ring. Golden Fire Bros. toss three coins as opposed to fireballs while the effects of the ring last. A single Fire Bro appears in the second course of the DLC stage Coin Challenge Pack B.
New Super Mario Bros. U
Fire Bros. reappear in the Wii U game, New Super Mario Bros. U. They behave the same way they did in the past installments, and are more commonly employed than any of their other brethren. Additionally, Fire Bros. have their own Enemy Course in Layer Cake Desert in which either a lone Fire Bro or a trio of Fire Bros. guard a star, as well as making their first appearance as a fortress/castle enemy. Two of them are also found in the Challenge Mode, Fire, Bro!, in which the player must dodge their fireballs within fifteen seconds. They area also featured in the challenge, Seriously! Fire, Bro!, which has the same objective, but with four Fire Bros.
They also appear in Snaking above Mist Valley, Slide Lift Tower and Ludwig's Clockwork Castle. This game also shows the first case of Fire Bros. being flipped, as proved in the level Fire Snake Cavern if the player stuns it with the light of a Glowing Baby Yoshi. In Light Blocks, Dark Tower, Fire Bros. can ignite Bob-ombs with their fireballs. This made it a dangerous guardian of one of the Star Coins in the level, as Bob-ombs will repeatedly drop from a pipe in the cave ceiling, increasing the probability of the Fire Bros. blowing them up. One way to prevent any danger due to their fireballs is to simply neutralize it with an iceball.
Super Mario 3D World
Fire Bros. appear in Super Mario 3D World, making their first appearance in a 3D Mario platformer game. These enemies are extremely common in this game, appearing in a multitude of levels. Their attack pattern is the same as that of Hammer Bros. and Boomerang Bros. in 3D Mario games, tossing two fireballs Directly at him before jumping to another position. Their fireballs can travel through Clear Pipes, and can also be put out. Some of them are found atop Goomba Towers and function as their commanders whose defeat clears remaining Goombas on a stack as well. Also, Fire Bros. appear in four hideouts throughout the game that act as optional enemy battles. In the game, Fire Bros' fireballs can defeat other enemies that come in contact with it, even one another. This is a great strategy in Fire Bro enemy blockades, in which Mario can get the Fire Bros. to face each other or get behind one another, & in that way, they kill their own brethren due to their own crossfire.
The Adventures of Super Mario Bros. 3
In the episode "Reptiles in the Rose Garden" two Fire Bros. and two Boomerang Bros. had been ordered to guard Mario, Luigi, Princess Toadstool and Toad while they were held captive in Castle Koopa's dungeon. However, Princess Toadstool fooled the two pairs into fighting each other so that she and her friends could escape.
Nintendo Adventure Books
In Koopa Capers, six Fire Brothers appear in the first chamber of Wendy O. Koopa's secret hideout in the Magma Pits, attacking Luigi by spitting fireballs from the top of a ramp. If he is Fire Luigi, Luigi defeats five of the Fire Brothers and chases the final one into a smaller chamber, where the two get into a stand-off, their fireballs always colliding in mid-air. If he angles it correctly, Luigi defeats the Fire Brother by shooting a fireball at a wall, which it ricochets off of, right into the Fire Brother.
Mario Baseball series
Mario Superstar Baseball
The Fire Bro also appears on Bowser's team in challenge mode. He has slightly less speed than his counterparts, and uses an everyday bat rather than the usual hammer or boomerang of the Hammer Bro and Boomerang Bro characters. Starting with this game, the Fire Bro's appearance has been developed to be wearing a red helmet and a red shell. Oddly, even though the Fire Bro uses a bat, his batting range remains the same as that of the Hammer Bro and Boomerang Bro.
Mario Super Sluggers
The Fire Bro later appears in Mario Super Sluggers with the same bat as in Mario Superstar Baseball. His fielding abilities have improved, and he has the best batting abilities among his counterparts. However, his pitching skills are not very good; the worst when compared to the Hammer Bro and Boomerang Bro.
Paper Mario series
Paper Mario: The Thousand Year Door
Flare, a Fire Bro, is a fighter in the Glitz Pit alongside Bamma and Hamma Jamma. He is the only Fire Bro to appear in Paper Mario: The Thousand-Year Door. Like Fire Bros. in earlier appearances, he spits fireballs as a main attack. These fireballs not only damage opponents, but may also cause them to catch fire as well.
Super Paper Mario
Fire Bros. make an appearance in the third installment of the Paper Mario series, Super Paper Mario. They are encountered on the stairs in Castle Bleck and in also in the Flipside Pit of 100 Trials, and act just as they did in Super Mario Bros. 3. Some Fire Bros. also have the unique ability to flip between dimensions.
Paper Mario: Sticker Star
Fire Bros. make an appearance in Paper Mario: Sticker Star. They are encountered in Rugged Road, Rumble Volcano and Bowser Jr.'s Flotilla. They have a bigger rarity than in New Super Mario Bros U, and Ice Bros. appear to be semi-common enemies. Fire Bros. have a red shell and helmet, just like they do in other Paper Mario games, but the only change is they do not have arm bands. the color outline of the shell is white instead of yellow. Their only attack is to throw a fireball at Mario. They are immune to all fire-based stickers (i.e. Fire Flowers and Burnhammer stickers); However, their main weakness is ice. When an Ice Flower or a Chillhammer sticker is used against them, they will take double damage. When a Thing sticker is used in the first area of Rugged Road, the Fire Bros. turn into Ice Bros. Fire Bros. are mostly assisted by Shiny Paratroopas. Touching a Fire Bros. fireball outside battle will cause Mario to lose 3 HP.
Mario Party 9
Fire Bro makes his Mario Party debut in Mario Party 9, appearing as a co-host of the Battle minigames. Whenever a player lands on a Battle Space, either Fire Bro or Hammer Bro show up, although Fire Bro appears less frequently. When Fire Bro does show up, he makes the players play a Free-for-All minigame, of either the captain or the player in last place's choice. Afterwards, he takes ten Mini Stars from the player who finished in last place and distributes them amongst the other players based upon their ranks. If the loser does not have ten Mini Stars, Fire Bro provides the rest. Additionally, if everybody ends up in first place or last place, Fire Bro will not give or take any Mini Stars from any player(s). Therefore, everybody's amount of Mini Stars stays the same.
Mario & Luigi series
Mario & Luigi: Dream Team
Fire Bros. make their debut in the Mario & Luigi series in Mario & Luigi: Dream Team in Neo Bowser Castle. In the field, they throw fireballs upon sight at Mario and Luigi. Making contact with any of them will initiate the battle with the brother who threw them. They will disappear when they eventually touch the ground.
In battle, Fire Bros. can rapidly hurl fireballs with the occasional 5-coin at the Bros, who must jump to avoid the fireballs. They may also throw a large fireball into the sky for it to rain down on the targeted Bro on the next attack turn of the thrower or at the end of the battle. If the Fire Bro hurls it up with his right arm, it'll fall on Mario, who must smack it back to sender with his hammer. If with his left arm, it'll fall on Luigi, who must instead smack it back. If any of these Fireballs touch Mario and Luigi, it may give them the Char status effect.
Mario Golf: World Tour
In Mario Golf: World Tour, one of the names that can appear on the tournament scoreboard is "Fire Bro".
Mario Kart 8
Captain Toad: Treasure Tracker
Paper Mario series stats and Tattle information
Names in other languages