From what is known about this entity, Sellout is a deformed version of the Sonic the Hedgehog, a type of entity which fits into an ordinary Sonic 3 cartridge (but using the Sonic 1 cover). Old languages say that cellout or also known as [redacted] is the closest thing that human beings knew to pure evil. It is said that mostly a person, poor, lonely and depressed, like any homeless person that you could meet on the street, will ask you at his best to accept the cartridge from him, telling you the story of how he lost everything including his daughter, it is believed that in fact, it is the same sellout in a human form so that you agree to have the game. Once started, you will see how your family will disappear, while in the Sonic game you have to face more enemies, each enemy you kill gives you a nerve, as if something was wrong. But in the end, you will realize that you really killed the souls of your family members that Sellout put into the game for the simple fact of making you suffer.... He will tell you what a bad person you are, how it was your fault, and the worst thing, that in fact he didn't force you to do anything, the nerves were warnings to stop that you didn't listen, he did nothing but pull the strings so that in the end, Who knows, no one has found each other after playing the Sonic game......

Pray to God that the cartridge is not in your house, you would be condemning yourself and your entire family.