Black Demon Dragon, known as 'ブラック・デーモンズ・ドラゴン' in Japanese, is a powerful Fusion Monster card in the Yu-Gi-Oh! anime series. Formed by fusing Red-Eyes Black Dragon and Summoned Skull, this dragon boasts high attack power and a menacing appearance. It is famously used by Joey Wheeler (Katsuya Jonouchi) in the series, symbolizing his growth as a Duelist. Black Demon Dragon plays a pivotal role in several duels, often turning the tide with its strength and fierce presence.