In Yu-Gi-Oh! Forbidden Memories, Yu-Gi-Oh! Duel Monsters II: Dark Duel Stories, Yu-Gi-Oh! The Sacred Cards, and Yu-Gi-Oh! Duelists of the Roses, Blue-Eyes Ultimate Dragon was treated as a ritual monster, summoned by a ritual card called "Ultimate Dragon". In the actual game, Blue-Eyes is summoned via the fusion of three "Blue-Eyes White Dragon" cards.
Contributed by Psychospacecow