Alleged Bourke Street killer Dimitrious Gargasoulas has declared himself "the saviour" and not guilty in his first appearance before a court since he was charged over the deadly drive through Melbourne's CBD.

Mr Gargasoulas, 26, appeared to be smirking as he appeared before Melbourne Magistrates Court via video link from prison on Wednesday,wearing a black jumper, with stubble on his chin and with his hair all black.

People lay flowers at the memorial to the victims in the wake of the Bourke Street attack. Credit:Jason South

"Your Honour, do you know ... I want to tell you something," he called out, before he was cut off by his lawyer, who told him there were media in the court.

Mr Gargasoulas then said: "I just want to say that Aboriginal law is identical to Muslim law."