Seto Kaiba is the billionaire rival from Yu-Gi-Oh! Duel Monsters, the 2000 anime series built around the Duel Monsters card game, famous for his Blue-Eyes White Dragon and his rivalry with Yugi. Kaibaman is a character from the sequel series Yu-Gi-Oh! GX who idolizes Kaiba, dresses like him, and duels with a Blue-Eyes deck, essentially a superfan turned duelist. Fans online turned the pairing into a running joke about devotion versus the real thing. This short clip comparing the two names taps into that long-running fandom gag.