Like all pre-made hot dog chefs, he appears in every neighbourhood, but he can't be interacted with. As a result, he can't be made playable without cheats.
Often going unnoticed, Hot Dog Chef has 24 personality points instead of the usual 25. He has the same facial structure as Jace Macarevich. Hot Dog Chef can easily be cloned in Create a Sim with debugging mode on.
Do NOT attempt to add Hot Dog Chef to a household, make him selectable, or tamper with him in any way or form. Doing so will corrupt the neighbourhood he is in.