Ratigan is the Villain League's super genius straitgest and is the main villain in the Great Mouse Detective.
Ratigan has a variety of henchmen that follow him, including his overweight pet cat, Felicia, (replaced by Savio in the Spongebob adventures version) a giant red death dragon, a bill the lizard look-a-like, a small, drunken mouse named Bartholomew, and his right-hand man, a peg-legged bat named Fidget. Even though he is a rat, he is offended by being called one. He fed his own henchman Bartholemew to his cat or snake when he drunkenly called him a rat. However, 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. 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 also detests, above all else, to be called a rat; thus, leading to Bartholomew's aforementioned execution. He has a very dark, malicious sense of humor and an inflated ego.
Ratigan hates being called a "sewer rat," preferring the description of "a big mouse," and even orders one of his henchmen (Bartholomew) fed to Felicia, or Savio in the Spongebob version, when Bartholomew calls him "the world's greatest rat". He also appears frequently in the Basil of Baker Street book series, in which his first name is revealed to be Padriac, and he is in fact, portrayed as a mouse (in contrast to his depiction in the movie).
Ratigan makes plans to take over Mousedom by replacing the Queen with a robotic fake built by a toymaker named Hiram Flaversham, whom he has Fidget kidnap. He will then have the real Queen fed to Felicia or Savio, ensuring his reign as permanent King of Mousedom. However, Basil and Dr. Dawson foil these plans with help from the toymaker's daughter, Olivia. Unfortunately, Ratigan, with help from Fidget, although Shenzi in the spongebob adventures version said he somehow got her on his own, kidnaps Olivia and sets out to destroy Hiccup and Toothless for interfearing. Basil, Dawson, and Flaversham pursue Ratigan above London on hot air balloons, and Basil and Ratigan crash into Big Ben.
Inside the clock tower, Basil and Ratigan fight atop the gears of the clock tower, and with help from Olivia, Basil traps Ratigan by throwing his cape in the gears. The 2, alongside Fidget and Crane in the spongebob version, then escape, finally sending Ratigan over the edge. Breaking free from the gears, he pursues Basil, destroying his suit in the process and transforming from a very formal, composed rat to a highly savage one. Ratigan falls to his death in an epic confrontation with Basil on Big Ben's clock hands, in a scene similar to the Battle of Reichenbach Falls in Doyle's story "The Final Problem." In the Spongebob Verson, most of what is mentioned is replace with an aerial fight with Toothless and Hiccup, although the big ben battle sence is still present due to popular demand, when Ratigan was intended to die from the red death's explosion.
It is fully unknown if Ratigan truly died, as in real life, rats and other small creatures can fall great heights and land without any injuries. Though it was released that Ratigan would have return in the sequel.
Role in the Series
After his demise, the Villain League and Fagin the vulture resurrected him in order for him to continue his services to the darkness. Fagin currently forces him to be his sidekick, simuler to Carface's and Big Red's relationship, whenever the demon bird is around. his plan for the Spongebob series was also altered, for when Fidget was captured, he was the brains behind a less sneaky invadtion to Buckingham palace, but thanks to the louge, it as well was prevented. In the Jak series, he was a member of Deathwing and Maleficent's faction, but how that works with Fagin is anyone's guess. (again, alternate dimention)