Cristian Dzwonik (Buenos Aires, 18 March 1971), better known as Nik is a cartoonist from Argentina, creator of Gaturro, and current cartoonist in the paper La Nación.
He received the 2002 Konex Platinum Award for Best cartoonist, and four times the prize SIP (Sociedad Interamericana de Prensa).
His works have been published throughout Latin America, the United States, Spain and France.
Plenty of evidence has come to light to prove that Nik has been involved in plagiarism of the work of cartoonists Quino, Caloi, Fontanarrosa, and Claudio Kappel among others.