Black Digitron

Black Digitron (ブラックデジトロン Burakku Dejitoron) is a mysterious secretion that is said to influence the evolution of a digimon into a darker colored subspecies. It is currently unknown what other effects the substance has.

In the case of Black Gaogamon and Black Mach Gaogamon, the influence of Black Digitron seems to have lowered their speed and agility, but increased endurance.