|Wart did not originate from fanon, and more information can be found on their respective wiki(s). You may read more about it on the following wiki(s):|
|The 8 Bits|
|Charles Martinet (Super Mario Advance)|
|First Appearance||Yume Kōjō: Doki Doki Panic (1987)|
Wart (Japanese: マムー Mamū) is the main antagonist of Yume Kōjō: Doki Doki Panic, its western counterpart Super Mario Bros. 2, and the latter's re-releases or remakes. Wart is a green frog-like creature who hails from the dream land that is Subcon (or Muu World in Doki Doki Panic), and uses the inhabitants' Dream Machine to create monsters and wreak havoc on the world of dreams. He leads an army of monsters known as the 8 Bits.
In Doki Doki Panic Wart seizes control of the Dream Machine that controls the weather and grants the inhabitants of Muu World peaceful dreams. Using the Dream Machine, Wart creates an army of monsters to attack the Muu, though they eventually learn of his weakness (his distaste of vegetables) and use this new knowledge to defeat the frog-like king.
The story of his uprising and defeat is told in a storybook which Rūsa the monkey gives to the two young twins Poki and Piki. During a small fight the two siblings have while reading the book, the twins tear out the last page, and make it so that Wart was never defeated by the Muu inhabitants. Wart then reaches out of the storybook and kidnaps Piki and Piki, whose cries alert the rest of their family - their parents, Mama and Papa, and their older sister and brother, Lina and Imajin - to Wart's presence, and the four of them jump into the storybook and chase after Wart.
In Super Mario Bros. 2 similar events take place. Wart manages to take control of the Dream Machine that keeps the peace in the dream land of Subcon, and uses it to create an army of monsters known as the 8 Bits. While the fairy-like inhabitants of Subcon learn about Wart's weakness to vegetables, they are powerless to stop him due to the strength of his minions, and instead opt to travel into the dreams of Mario and ask for his help. The next day, Mario, Luigi, Toad, and Princess Peach discover a door to Subcon, where they meet the Subcons and set off to stop Wart's plans and take back the Dream Machine.
In BS Super Mario USA, the sequel to Super Mario Bros. 2 released exclusively in Japan through the Satellaview peripheral, it is revealed that Wart escaped to another dream after his defeat at the hands of Mario and his friends. After laying low for an undisclosed amount of time, Wart and the 8 Bits return to Subcon where they force Subcon's king into hiding and steals the golden statues of Mario placed around the kingdom after Mario, Luigi, Toad, and Peach saved Subcon previously. The four of them are called to Subcon once more, this time by the king, and are asked to save them from the frog king again.
Like Mouser and Birdo, Wart will also periodically appear during gameplay to cast a spell on Mario, changing all enemies on screen into Bob-ombs or changing the character the player controls. Upon his defeat, Subcon becomes disconnected from the Mushroom Kingdom and disappears.
Wart is also an unlockable character in New Super Mario Kart.
Wart appears as the main antagonist and final boss of Super Mario: Wart Returns.
The evil frog king reappears in Toad's Time to Shine. He is the main antagonist: He kidnapped Toadette, Toad's sister. He is fought two times: The first time in the middle of the game, and the second time as the final boss. His attacks include throwing sticky bubbles, ground pounds and shockwaves jump. He gains the ability make the area dark for a few seconds, and also to launch dark red beams from his hands. Despite beign that strong, he gets defeaten by Toad.
Wart appears in the very first episode of the first season of Super Mario Revival as one of the many villains revived by King Polarite. He is summoned by Emeri to fight Mario, Luigi, Peach, Daisy, and Toad.
Wart, or Walnort as he is called in this game, is a Null Heart and the main antagonist of Crossover Quest I: Walnort War. He is one of the few remaining Dream Demons remaining after Bill Cipher killed most of them, as he fled to the Mushroom Kingdom to escape him. Walnort previously attempted to defeat Mario, seeing as big of a threat that he may be to his plans, but was unsuccessful; if a Dream Demon kills someone in the Mindscape, they die in the real world as well. Since his original defeat, Walnort has been trying to increase his strength by collecting others' hate.