Can’t beat it.

Among the Royal Knights, only Alphamon can suppress Lucemon's fallen form, while Omegamon and Red Lotus Knightmon are not Lucemon's opponents.

Red Lotus Knightmon's true Red Lotus form (Dukemon's crimson form) wears red lotus-colored bright armor, Dukemon's hidden form. As all the power is released, the armor becomes heated and dyed red.