Markus

Marcus is a main character in Yu-Gi-Oh! AS. He's Shawn's little brother.

Decks
Markus plays a Gimmick Puppet Deck, focused on a Swarm strategy, sometimes even aiming for a OTK.

During the Season 2 Markus still plays a Gimmick Puppet Deck, but more focused on a OTK strategy. He also obtains Rank-Up-Magic Argent Chaos Force, which allows him to Rank-Up his Xyz Monsters.