Wart

"I am the great Wart! Bah ha ha!!"

- Wart

King Wart is an old anthropomorphic frog king and the main antagonist of Super Mario Bros. 2 and its base game, Yume Kōjō: Doki Doki Panic. He is the leader of his troop known as the 8-Bits, and one of the evil arch nemesis's of Mario. Wart is one of the main antagonists of Super Mario Bros. X: Sea Side Adventure who plays a major role in the series, as he also leads the 8-Bits and the Koopa Troop (when he actually has a hard time with Bowser's troops). While he was away, he had some new members of the 8-Bits known as the Mamous, which is a species of frogs who look like Wart.

The Battle over the Throne
It was said in the legends that the first king of Subcon had fought the Frog King in his youth. Wart wanted to rule over Subcon and the king had to face Wart to prevent him to rule over it as its new king after killing the Hero of Dreams. But the first king had failed and lost the battle. Wart then toke his sword. During his last stand, he locked the link to Subcon and got Wart out of the world, hoping he won't return here.

The Era of Subcon's New Hero
Years have passed after that and the seal had been broken. Wart had came over to Subcon to rule over it and enslaved its inhabitants to be his soldiers and also creating monsters using a device called the Nightmare Machine. Wart's victory is seemingly assured, as it expands greatly, the magnitude of his army, the 8-Bits. With the 8-Bits all across the world, he had his leaders in each of the lands of Subcon. While doing so, he and one of his soldiers also had the Yoshis (who used to live in Subcon years ago) to be sealed within eggs and modify the Grand Subcon Castle. Yoshi, who also had a trip in Subcon while sleeping, was sealed within a Yoshi Egg by Wart. In a desperate attempt to save their world, Subcon's original inhabitants, the fairies (also called Subcons), contacted the great hero of the Mushroom Kingdom, Mario, in his dreams to ask for his help. They also gave him a hint to beat Wart, which was his distaste for Vegetables. Mario, believing the message to be nothing more than a strange dream, dismissed it and later went on a picnic to the park with Luigi, Toad, and Princess Toadstool. Mario then discovered a door in a cave, leading to Subcon, where he could face Wart.

Wart, the 8-Bits and their leaders were all defeated by Mario. Subcon was free from Wart's reign, including fairy inhabitants of the world. Then Mario and friends went to search for Yoshi Eggs around Subcon (when it was somewhat of a competition of Yoshi). Directly after the victory celebration, before Mario woke up in his bed, the king of Subcon and the commander had proclaimed Mario the Hero of Subcon (which was a similar title given to a hero who failed to defeat the Frog King as said in the old legends of Subcon). Wart, angry and jealous, returned to Subcon with the 8-Bits and leaders for one more conquest in the world, overthrowing the king and also stealing the Plumber's Laments of his old nemesis. In the end, the 8-Bits still lost again against Mario, with Luigi, Toad and Princess Toadstool. With this, Wart's antagonism was gone for good. Hoping that the Frog King wouldn't antagonize Subcon again, the king and the Subcon Fairies have used their magic to exil Wart to another world from an alternate timeline.

The Era of the two Heroes of Time
Wart, who had lost to the successor of the Hero of Dreams, was found unconscious in the land of Hyrule. Some years ago prior the start of the first Hero of Time's adventure, King Wart had faced the legendary Don Gero to see who is the best frog ever in that land. He defeated the legendary frog Don Gero and won. However, his last words to the Frog King was to replace him and lead the Frog Choir in the future. As a spirit, he then rests within Wart's body, making him Don Gero's reincarnation and granted him immortality. 18 years later, in an alternate timeline of the adult first Hero of Time in which he died against Ganon, Wart had toke the Ocarina of Time he recieved hoping that he could use the Song of Time to have the Goddess of Time to retrieve his other selves from other timelines which is up for the successful Hero of Time to protect from Ganon.

Wart in Koholint Island
Hundreds of years had passed in the Downfall Timeline after the Hero of Time was defeated. Wart wasn't able to use the Ocarina of Time yet and he was somehow found in Koholint Island while subconscious somewhere in the outside world, where he was somehow turned into a toad. He then lead the Frog Choir and made his first unreleased cut known as the "Frog's Song of Soul", hoping to be reawaken so he could finally try to use the Ocarina of Time again. He met the hero Link and taught him that song. He realized he somehow looked like the Hero of Time and believed he would make a great hero. Before the Wind Fish woke up, he retrieved some members of the 8-Bits and the Koopa Troop and successfully performs the Frog's Song of Soul with the Ocarina of Time and wake up in the outside world, returning into his original form.

Retrival of the Two Frog Kings
Directly after that, he performed the Song of Time and the Goddess of Time finally reacted and made him traveled trough timelines along with his allies to retrieve his other two selves from other timelines; one who was found somewhere in the darkness (the Child Timeline) and one within the ocean (the Adult Timeline), then fused together as one Frog King and became more exceedingly powerful. He then returned back to his original time from Mushroom World as Hyrule's time is actually more faster than Mushroom World itself, which took place more than 8 years before the events of Super Mario Bros. 2, and more than 15 years before the events of Super Mario Bros. X: Sea Side Adventure.

The Modern Era
15 years later, it was time for Wart and his new army of the 8-Bits and the returning members, such as Birdo, Mouser and others, to go to Sea Side and invade it to make it his kingdom. However, he was then sealed within Subcon that was secretly found in Sea Side's Vanilla Dome which was forbidden to enter.

Birdo
Birdo is someone very special to Wart out of the other members of the 8-Bits. He trusted her since she was the one who was mostly loyal and faithful to her master. But they sometimes have a relationship that is different from master and servant. Despite that she always fail to defeat Mario and his friends, Wart had acknowledged that she really cared about him and her allies, since she never gave up fighting him. After Wart was exiled by Subcon's inhabitant at his second defeat, Birdo had escaped and betrayed him by joining the Mushroom Kingdom's people, for the first time with Toad to defeat Wario. Birdo returned to Wart and the 8-Bits, despite that they were aware of her bond with the Mushroom Kingdom and the Beanbeans, and apologized to them for what she had done, but Wart was the only one to forgive her, then she promised to never betray him and become a burden to them again.

Yoshi
Yoshi became one of his targets since he was the most special one of his kind, like Birdo, and was the first successful wielder of the Egg-Blade.

Koopa Troop
Despite that Wart has the capability to lead the Koopa Troop, he still have a hard time to give them orders, since they still serve Bowser, and both of the Koopa Troop and the 8-Bits don't usually get along well. Ludwig von Koopa and one of the Koopa Troop members consider the 8-Bits inferior to them. However, it does not matter for both of them to start getting along, like Boom Boom, Birdo and Mouser are currently doing.

Trivia

 * The developers of Super Mario Bros. X: Sea Side Adventure have once stated that Wart will reach a powerful and godly level, currently making him the second strongest villain character of the series after Bowser and before Ludwig von Koopa.
 * It is confirmed that Wart will have a more serious role in the series as well.