Name's Reflux. Medical condition or super power, you decide.
~ Reflux introducing himself
Reflux (real name Gus Burns) is a supporting hero in the Pixar's movie Incredibles 2; sequel of The Incredibles.
He is voiced by Paul Eiding.
Reflux first appears when Winston Deavor introduces Elastigirl to him and the other supermen in his office. When he talks to the superhero, he jokes that his superpower of hers is what she decides.
Later in the film, it is revealed that Reflux was hypnotized by Evelyn along with the other supers using her hypno-goggles, and as soon as Mr. Incredible has left to save Elastigirl, after receiving Evelyn's false news that she has been kidnapped, Reflux and the other hypnotized supers break into the new Parr house to kidnap the boys.
Luckily Frozone arrives in time to save the boys, only to be hypnotized.
On Winston's yacht, Violet, Dash and Jack-Jack hide on top and rescue their parents and Frozone. When the other hypnotized supers arrive to fight them under Evelyn's orders, in the ensuing battle, Reflux vomits lava on Violet's forcefield, and is then freed by Frozen when he gets ahold of his goggles and breaks them.
Reflux is last seen with the other super in a Metroville court where it's decreed that the supers are no longer outlawed.