Reznor

Reznors (alternatively pluralised as Reznor ), also called Rhino Dinos, are fire-breathing  that made their debut in Super Mario World. According to the game's instruction manual, they were cursed by Bowser. They are mid-bosses that Mario and Luigi fight in fortresses found everywhere on Dinosaur Land. They are now found in the Mushroom Kingdom since their appearance in New Super Mario Bros. 2. Similar to how the Koopalings are named after various musicians, Reznors are named after of the industrial rock band.

Super Mario World
In Super Mario World, Reznors spit fireballs at the player. Caped Mario or Caped Luigi can dissipate the Reznors' fire with their capes. Mario must hit their platforms from below or shoot fireballs at them to defeat them. The player has a limited amount of time available to knock off the first and second Reznor and then jump to one of their platforms as the floor begins breaking away exposing the molten lava below at the start of the battle. If the player does not defeat the rest of the Reznors promptly, they will have to jump onto one of the abandoned platforms and fight from there. It is, however, possible to defeat all four without doing so.

They are the bosses of four fortresses scattered through the areas of Dinosaur Land: the Vanilla Fortress, the Forest Fortress, the Chocolate Fortress, and the Valley Fortress. The four Reznor sets all behave the same.

New Super Mario Bros. 2
Reznors reappear in New Super Mario Bros. 2 as the game's tower bosses, and their battle theme is a cover of the Super Mario World boss battle theme. They now roar before the battle starts. Their appearance has changed slightly, with their lower jaws and belly having a lighter tone, and their heads redesigned to better resemble those of Triceratops. The platforms they stand on are now coin-giving Long ? Blocks, and the word "REZNOR" on the boards behind the wheel is gone. Unlike in Super Mario World, where four of them always appear on a single four-platform wheel, Reznors appear either in groups of two or four, and their wheel and bridge setups can also vary. After defeating half of them, the remaining Reznors roar and stomp their blocks, causing the bridges near them to collapse, much like in Super Mario World. They do not attack as frequently as they did in their debut game, and the bridges do not collapse as quickly. Reznors can be defeated when Mario hits the block underneath them, hits them with six fireballs or one gold fireball, or simply touches them while under the effects of the Invincibility Leaf. If defeated by a gold fireball, they will give thirty coins each.


 * Level appearances
 * World 1-Tower: Two Reznors on one wheel with four Long ? Blocks.
 * World 2-Tower: Four Reznors on one wheel with four Long ? Blocks.
 * World 3-Tower: Same as World 2-Tower.
 * World 4-Tower: Four Reznors on two wheels; two Reznors per wheel, with each wheel having four Long ? Blocks. One bridge is positioned to the left of one wheel, while another bridge is positioned to the right of the other wheel.
 * World 5-Tower: Four Reznors on two wheels; two Reznors per wheel, with each wheel having four Long ? Blocks. One bridge is positioned between the two wheels.
 * World 6-Tower: Four Reznors on one giant wheel with eight Long ? Blocks.

Mario Golf: World Tour
Although Reznors themselves do not appear in Mario Golf: World Tour, a Reznor costume is available for Miis to wear, and they can also use a ball and set of golf clubs that are based on a Reznor.

Super Mario Adventures
In Super Mario Adventures, several Reznors are shown to inhabit the basement of the Koopalings' Tower, attacking anyone who is dumped into the basement. These Reznor were apparently destroyed when, after attacking Princess Toadstool, Friendly Floyd, Mario, Luigi, Toad, and Yoshi, the Reznor ignited a bomb held by Princess Toadstool, blowing up the Koopalings' Tower.

Later in Super Mario Adventures, several Reznors, riding their spinning platforms, can be seen at Bowser's wedding to Princess Toadstool.

Super Mario-kun
Reznors appear in the Super Mario World adaption of the Japanese manga Super Mario-kun.

In the second 4-koma of the first volume, they attempt to spin very quickly in order to make it harder to hit them, but due to the speed, they fall off their platforms from dizziness.

They reappear in volume 4, where Mario tosses Yoshi to their contraption, making three of them fall. The remaining Reznor attacks Mario directly by charging at him, knocking Mario onto a Switch Palace. Inside, there are many Spinies and a Gray P Switch. Mario uses the switch to turn the enemies into Gray Coins, score multiple lives, and clone himself into Mario x99, who then defeat the Reznor.

Minecraft
In the Super Mario Mash-up in Minecraft, Ravagers are replaced by Reznors.

Trivia

 * Prototype assets of Super Mario World show that "Bunbun" was one of the tentative phrases on Reznor's sign, possibly indicating that it was Boom Boom earlier in development.