"SILENCE, TRAITOR! I AM NOT A RAT!!!!"
- Ratigan to Mickey just before his boss battle during the War of Enchanted Dominion
Professor Padraic Ratigan the III is a member of the illusive Dominion XIII, being Rank Number IX in the heirarchy. He is a major antagonist in the Kingdom Hearts Unlimtied Saga, being the main enemy of his world of Mousedom in "An Empire of Dreams". Ratigan is very charismatic, calm, and calculating, but can easily be sent into a violent rage at the mention of Basil or by the incompetence of his minions. He controls water, and uses his weapon, the Sitar, as a musical instrument to make water fight for him in battle.
He later returns in "Return of the Keyblade", where he is resurrected by Maleficent's dark magic to serve a new team in opposition to Emperor Palpatine's Thirteen Seekers of Darkness.
Ratigan is a towering rat with gray fur dressed in a dark gray suit complete with a long black cape with a red underside. His face is shaven and has yellow eyes with lavender circles around them, above them are thick eyebrows. Although he lavishes himself as a mouse, he has rat-like characteristics, such as sharp fangs and fingers, a large nose, and a long, pink tail. On his head, he wears a black top hat with a gray band, which covers his black combed hair. His suit includes a high white collar and a gray vest with buttons on it with a pink-and-purple striped cravat. On his hands are white gloves and cuffs with golden cufflinks. He is always seen carrying a gold cane.
However, when he becomes completely enraged, he becomes incredibly feral, where he stops being bipedal and runs on all fours in a hunched position. His hair becomes messy and his clothes become torn as Ratigan becomes vicious as he obtains a more rat-like appearance. His nails and teeth also grow longer and gnarly.
Personality-wise, Ratigan is very charismatic, calm, and calculating, but can easily be sent into a violent rage at the mention of Basil or by the incompetence of his minions. He has a very dark, malicious sense of humor and an inflated ego. Like most villains, Ratigan is an ebullient, lip-smacking jester who has a tendency towards big movements and long rants or speeches.
Even though he is one, Ratigan detests, above all else, being referred to as a rat, preferring the description of a "big mouse," and fed Bartholomew to Felicia when Bartholomew calls him the "world's greatest rat" while intoxicated. He can easily be identified as a rat since he has 4 fingers and a thumb on each hand while all the other mice have 3 fingers. Also, the mice in the movie have much smaller, thinner tails than Ratigan, who has a long, fleshy tail. In the Basil of Baker Street book series, Ratigan's first name is revealed to be Padriac, and he is in fact, portrayed as a mouse (in contrast to his depiction in the movie).
With his usual laid-back personality and despite his often sitting around, Ratigan seems to be on good terms with both Warp Darkmatter and Ben Ali, haughtingly calling Warp "Mr. Spaceman" and is often shown talking to him in the Grey Area. In return, the two other villains try their best to keep him friendly by not calling him a rat in his prescence.
Professor Ratigan seems to dislike fighting in person, seeing it as beneath him while he is still sane, mostly sending out his thugs, especially Fidget, to do his missions for him; he even goes as far as manipulating Michael, dumping his missions on the younger Empty Shell and going off to have fun throwing parties glorifying his image. Often, he wishes that Emperor Zurg wouldn't make him go out into the frontlines and says that he'd prefer to stay at The Castle Of Non-Existence or at least be given a recon mission.
In his final battle against Mickey and Basil, however, his true nature as an emotionless entity filled with hatred and ferality is revealed, proving that his lighter attitude is a farce, or at least partially his true self to keep his more monstrous side in check. Yet when he is defeated, he screams in agony and defeat, before falling to his doom from atop Big Ben. This may indicate that he did not fully reject his fake emotions, but, overall, he seems to have come to terms with his lack of emotions.
Boss Strategy: The 13th Dilemma
While Ratigan's henchmen are usually portrayed as being weak, cowardly, and lazy, Ratigan himself proves to be no pushover in the battle with Mickey and Basil. Ratigan, being a musician with a flair for the theatric, uses music to control the water around him and to summon "water forms", objects shaped out of water into musical instruments or copies of himself, which move about the battle area to hit Mickey, forcing him to defeat the forms in a certain amount of time to avoid an automatic loss. He can also summon violent geysers that erupt from the ground, forming strong streams of water which damage Mickey and throw him into the air. His sitar is rarely used as a weapon, but most often used to play his music instead. However, Ratigan does use one move using his Sitar as a weapon, but it does little damage to Mickey. Ratigan does little fighting by himself, instead relying on his control of water to make it fight for him.
However, when his Sitar is knocked out of his hands and he is caught between two gears of Big Ben's interior workings, he snaps and reveals his true strength as a physical fighter with a penchant for flaring his sharp claws to slash with at his opponents.
During Ratigan's Final Limit, he releases a large ball of water while jamming out on his sitar. The ball creates a watery explosion that knocks enemies back and deals water damage.