What Do You Give Me For? Frankie Carbone and Louie from "The Simpsons"

What do you give me for Frankie Carbone and Louie from "The Simpsons?"
Actor Frank Sivero is suing the creators of the "The Simpsons" for $250M saying Louie is based on his character from "Goodfellas."
Sivero says in 1989 he lived in the same apartment complex as some of the writers for the show. During this time he developed the character of Frankie Carbone. He says he told the writers about his character and that they based "Louie" on Carbone.
Louie first appeared in 1991 and has had 15 appearances in total, including as recently as April 2014.