The Sims 1 - Sunny, The Tragic Clown 

In The Sims: Livin' Large, the Tragic Clown visits depressed Sims who own the Tragic Clown painting. He usually wanders around the house, crying and coughing and failing his tricks. If he is trapped in a room or by fences, the Tragic Clown will create a magical hole in the ground and jump in to emerge elsewhere on the lot. The Tragic Clown also features in every subsequent expansion. With House Party, the Tragic Clown will sometimes pop out of large cake instead of the entertainers. However, the audience will boo him and he will eventually flee the lot. With Hot Date, the Tragic Clown can also appear Downtown if the lot contains a Burger Clown sign. With Vacation, he will appear on a Vacation Island lot, but Vacation Director Kana will eventually shoo him. With Unleashed, cats will hiss at him while dogs will bark at him, making the clown cry. With Superstar, the Tragic Clown may occasionally appear in Studio Town as one of the backup dancers in place of the usual performers when a famous Sim records a music video in a bad mood. With Makin' Magic the Tragic Clown can also occasionally appear on the autumnal lots in Magic Town. He will ride the roller coaster and hug the clown janitor, Witty Washout.
Someone said before that he could appear aswell with the genie lamp if you choose the love option. I tried more than 100 times and couldn't make him appear. I'll upload a separated video if I finally manage to do it.