Allegro is a robot built by Bass.EXE that appears in one episode of MegaMan NT Warrior Axess. He captures NetNavis that win a game at an arcade and forces them to fight each other to the death for his amusement. Mayl and Roll.EXE win the game to lure him out and Roll is captured shortly after. They manage to track down Allegro and corner him. He then bursts out crying and Bass, in Kid Grave's body, comes and explains Allegro's origin. He was a robot created by Bass to test Dimensional Area's, but stated that he was disgusted by Allegro and crushed his CPU, killing him.