Its unknown why AD.exe exists. It was created when AD tried to make a clone but inserted sonic.exe disk on and then AD.exe was created. AD.exe has a counterpart called AD.com (Or exe.DA). He also killed Squidbob Tentapants and Squidbob became Squidbob II. People said he was on Lalleo School on Halloween, but it was actually AD in disguise. After that, he was literally nothing, but one day, he started corrupting AD's body until to make him turn into his Creepypasta Form.