A Brisbane serial pest has been convicted for public nuisance after performing "ninja air kicks" outside a West End pub and harassing women at a supermarket.

The Brisbane Magistrates Court heard Emmanuel Augustino Bago was harassing women at a bus stop on November 15, during the G20 Summit.

Emmanuel Augustino Bago outside court on Thursday. Credit:Seven News

Customers at the Cobbler bar complained that he was trying to talk to them from outside, prosecutor Sergeant Carrie Davidson said.

"He's then decided to do ninja air kicks and waited at the bus stop outside the offence location," she said.