Ue-Sama

The Ultimate Ninja is a character in the TMNT series. In his initial appearances, he was an adversary of the Turtles. He appeared in the 2003 series.

Character History
The son of the Battle Nexus Ultimate Daimyo, the Ultimate Ninja first came to Earth to fight Oroku Saki, The Shredder. However, he was deprived of the chance after learning that the Shredder had seemingly met his death at the hands of Leonardo; in response, he challenged Leonardo to a duel, and the two fought to the death. Where Leonardo fought with honor, the Ultimate Ninja did not, and even attempted to kill Leonardo by conjuring up a dragon, which the Ultimate Damiyo killed, after the fight ended. The Ultimate Damiyo appered, and saluted Splinter for teaching his sons such honor.

The Ultimate Ninja later appeared again when the Turtles entered the Battle Nexus. Allied to the evil Drako, a former opponent of Splinter's, he planned to destroy the Turtles and take over the multiverse. He nearly succeeded, poisoning Leonardo and implicating Splinter in an attempt to murder the Daimyo. However, the Turtles, along with their allies Miyamoto Usagi and Traximus, were able to thwart his plans. Both the Ultimate Ninja and Drako were then pulled into a warp in time and space ripped open by Drako's use of the Daimyo's War Staff.

He later appeared as a pet of Savanti Romero, having been fused with Drako into a grotesque entity known as Ultimate Drako. Stealing the Time Scepter of Lord Simultaneous, he scattered the Turtles throughout different realities, captured Splinter, and weakened his father the Daimyo. He later seized the war staff after Leonardo failed to use it to recover his missing family. Wielding the power of Scepter and Staff, he gathered Leonardo and Usagi together, trapping them in a battle with powerful monsters.

With the Turtles occupied, Ultimate Drako was ready to destroy the Daimyo. But some part of the Ultimate Ninja still cared for his father, and his hesitation allowed Splinter to grab onto the War Staff and summon his sons to him. The Turtles and Splinter managed to gain possession of the two relics. The Time Sceptre, being partially sentient, combined its powers with those of the War Staff to restore everything to its natural order, including the separation of the Ultimate Ninja and Drako; however, both were then petrified and crumbled to dust. Fortunately for the grieving Daimyo, Simultaneous decided to give his son a second chance, and revived the Ultimate Ninja as a child.

The Ultimate Ninja later befriended the Turtles when they returned to the Battle Nexus for Michelangelo's rematch to determine the true victor of the Battle Nexus tournament. He remembered Leonardo, but decided that he must have been someone he played with and declared him his friend. He was temporarily held hostage to ensure that the Daimyo could not interfere with the removal of the Nexus' safety rules, but rescued by Leonardo. Later on, he and his father witnessed April's and Casey's wedding from the Battle Nexus through an interdimensional window.

Video Games
Ultimate Ninja appears in the game Teenage Mutant Ninja Turtles 2: Battle Nexus as a boss.