The flag of the Flemish Movement (also known in Dutch as the strijdvlag "battle flag") is based on the flag of Flanders, but the lion is entirely black and has only three digits on each paw. It is popular among Flemish nationalists, who seek for Flanders to secede from Belgium or just otherwise promote Flemish culture and the Dutch language.
Neo-Nazis wave the Flemish movement's flag and the Prince's flag.