The devolve effect also works on the bells spawned by the Mine Flayer. This changes the bells into Arrowkin as well as sending out the ring of bullets they usually emit upon death, so using the gun in this fight is not recommended.
The devolve effect does not work on bosses.
The devolve effect also does not work on Mimics; however, bullets will still occasionally play the "devolve" sound when hitting a Mimic.
Devolved enemies will spawn with full health, in some cases granting them more health than before transformation.
This gun is a reference to the publisher of Enter the Gungeon, Devolver Digital.
Its ammo counter is represented by Ds similar to the Devolver Digital logo.
The quote "Degenerates" preceding the description is a play on words, describing both the effect of the gun (degenerating the strength of enemies) as well as poking fun at Devolver Digital by implying they're degenerates (people of limited morality).