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Reznor are fire-breathing Triceratops 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, Reznor are named after Trent Reznor of the industrial rock band Nine Inch Nails.
Super Mario series
Super Mario World
In Super Mario World, Reznor spit fireballs at the player. Cape Mario or Cape Luigi can dissipate the Reznor's 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 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 Reznor 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 sets of Reznor all behave the same.
New Super Mario Bros. 2
After a long absence, Reznor 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 resemble those of triceratops. The platforms they stand on are now coin-giving Rectangular Coin 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-plaform wheel, Reznor appear either in groups of two or four, and their wheel and bridge setups can also vary. After defeating half of them, the remaining Reznor roar and stomp their blocks, causing the bridges near them to collapse, much like in Super Mario World. They don't attack as frequently as they did in their debut game, and the bridges don't collapse as quickly. Reznor 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.
Mario Golf: World Tour
Super Mario Adventures
In Super Mario Adventures, several Reznor 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 Reznor, riding their spinning platforms, can be seen at Bowser's wedding to Princess Toadstool.
Reznor appear in the Super Mario World adaption of the Japanese manga, Super Mario-Kun. They attempt to spin very quickly in order that Mario and his friends cannot hit them, but due to the speed, they fall off their platforms, thus making Mario and his friends win the fight. They reappear in volume 4. Only one, however, is apparently real. During the fight, the Reznor knocks Mario onto a large building that resembles a ! Switch. Inside, there are many Spinies and one P-Switch. Mario uses the P-Switch to score multiple lives, giving him several clones. They then defeat the Reznor.
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