Caius The Shadow Monarch!

Monarchs (T-Bone) versus Elemental HERO Neos, Neo-Spacians, and Fusion Monsters (Jaden Yuki). The duel between these two duelists where T-Bone was ordered by Sartorius' sister Sarina to defeat Jaden in a duel. This would be a great duel for T-Bone in an alternate dimension where he would actually defeat Jaden in their duel in order to fulfill Sarina's order, however I believe that Jaden's friends would probably still find a way to save him and help defeat T-Bone and his powerful Monarchs.