Luigi

'''"I'm-a one very-a happy stereotype!"

- Luigi's unlock message. '''

Luigi Risotto is a non-premium character in the Business Owners collection. He is unlocked upon building Luigi's.

Simpsons Wiki Description
Luigi Risotto is the proprietor of Luigi's. Luigi often treats his customers rudely, insulting and belittling them; at times under his breath, at other times in a conversational tone, and sometimes shouting the slurs to the (unseen) chef Salvatore. Luigi seems to have some connections to the mafia. Local gangster Fat Tony is a frequent customer at his restaurant, despite the fact that he was one of the targets of Fat Tony's plan to get rid of all other food retailers except Marge's. He does not actually speak Italian, only "fractured English" a strong Italian accent, as did his parents. He says the phrase, "I guarantee." a lot.
 * Read the full article here at Simpsons Wiki.