Richie Rich

Richie Rich is a cartoon character.

History
While Bart and Lisa were reading a Richie Rich comic book, they noticed a similarity between Richie and Casper, making them think about that Casper is actually Richie's ghost.

When Comic Book Guy tried to get rid of some comic books, including Richie Rich: Incorporates in Delaware, he made Bart buy them.

Non-canon
When Bart was in the prison, his good friend Richie Rich played his role in the Simpsons series. However, the episodes with him in weren't very popular.

Behind the Laughter

 * Richie Rich is a character from Harvey Comics.