Who is the evil wizard on 'The Smurfs'?

Gargamel is the evil enemy of "The Smurfs."

Specifically, a wizard is supposed to accomplish what he wants by magic or supernatural means. Gargamel does not appear to boast of any such magical properties. Instead, he seems to know how to make magic potions. This is part of the job description of an alchemist. An alchemist who makes magic potions specifically for the purpose of doing evil is considered an evil alchemist and enemy of the Smurfs.