Matthew Knight, 20, from Percival Terrace, Brighton, is accused of robbing a man on November 2.
He appeared before Lewes Magistrates' Court on Saturday (November 7) where he was remanded to re-appear at Lewes Crown Court on January 8, 2010.
Knight was arrested on Friday, November 6, along with two men from Brighton who remain on bail while enquiries continue.
Over a period of three weeks there has been a rise in the number of robberies in the area of Dukes Mound.
A Sussex police spokesman said:
"Those in the area after dark are reminded to be aware of their personal safety and call 999 if they experience or witness an incident."
Police are appealing to anyone who has information about the robberies to contact them on
0845 60 70 999 or to call Crimestoppers in confidence on
0800 555 111.