Malladus

Malladus, the Demon King, is the antagonist of The Legend of Zelda: Spirit Tracks.

Biography
Prior to the events of the game, Malladus ruled over New Hyrule, and the inhabitants of the land lived in fear. Eventually, a rebellion broke out and the spirits of the land helped the inhabitants defeat Malladus. Despite this, nobody had enough power to kill the being, and the people could only muster enough strength and energy to subdue him with chains and shackles and bury him underground. The shackles, extending the land of New Hyrule in four different directions, became the Spirit Tracks, and the surrounding community used these tracks as transportation railways. During the game, Chancellor Cole kills Princess Zelda and uses her body as a vessel in an attempt to revive Malladus. To stop him, Link must ascend the Tower of Spirits which has been broken apart into segments, and secure the Stone Maps, to prevent the removal of the Spirit Tracks which imprisoned Malladus.

At the midway point in the game, Malladus is revived in Zelda's body. Byrne demands that he be given the power he disires for freeing him, but he simply attacks Byrne and then escapes to the Dark Realm with Cole, via the Demon Train.

Later on in the game when Link, Zelda, Anjean, and Byrne who is now on the good side, get to the Dark realm, Link and Zelda in a phantom's body fight Chancellor Cole while Zelda tries to reach Malladus. When Zelda reaches Malladus, she grabs him, giving Link the oppritunity to shoot him with a Light Arrow. The Demon Train is then destroyed and Zelda is reunited with her body. Byrne then appears and protects Zelda from Malladus. Malladus then encapsulates Bryne in a force-field of purple lightning, and kills him. Malladus then consumes Chancellor Cole and fuses with his body, forming a gaint, boarlike beast. During the final battle, Link must protect Zelda from Malladus' flaming boulders while she tries to channel her inner power. When the completes doing so, she plays a song with Link and the other Lokomos, creating a weak point on Malladus' back. Link must now distract Malladus while Zelda fires a Light arrow and his back, causes him to fall over, allowing Link to attack his horns. When both horns are cut of, Link sends the final blow into the crystal on Malladus' forehead, shattering it. Light begins to shine within Malladus' body, destroy both his spirit and Chancellor Cole.

Etymology
Malladus' name is possibly based on a famous type of European steam engine: the Mallard. This seems probable due to the fact that many characters in Spirit Tracks are named in relation to trains.