The Devolution Gun is a powerful weapon in the Super Mario Bros. film. It was mainly used by President Koopa. The device could be used to mobily access the raw power of devolution into a gun. When it hits a victim, it will turned them into their ancestral species. It can transform Humans into primates, having been designed specifically as weapons against the Mammalian dimension. Hitting a denizen of the Dinosaur dimension, however, will result in the person de-evolving into their ancestral species.