Fagin

Fagin was once a mortal bird, till he was defeated by two sparrows, two mice, and betrayed by his own enslaved dove, which led to him burning to death, or it seems, Fagin's soul was recovered, and his body revived by Malefor and the dark spawn lords, and declared him the bird of the dark spawn of sarrow, the eater of saddness and depression, which can also served him as he'll be able to summon Dark spawn warriors, heartless, and even the nobodies.

Fagin first appear in Spongebob and friends in cat's don't dance, he was feasting on saddness and depression from his broken hearted victims, even that of Sawyer, but thanks to a spunkiness of Danny, and the shell louge squad, he was defeated and banished from hollywood (the Hynias gaved him the birdy boiler treatment)

it may be possable that he'll return again to reak his horrable vengenges.

his partner in crime (in his opinion, a prodosay) was Ratigan, his soul slave because Fagin revived Ratigan with dark spawn magic, and Ratigan is Fagin's enternal slave, and Fagin offen glots that he has a higher evil status (which he does, he is a dark spawn villain) over Ratigan.