B.E.S. Big Core MK-2 is a character version of the card "B.E.S. Big Core MK-2" in Yu-Gi-Oh! 5D's World Championship 2010: Reverse of Arcadia.
It appears in World Championship Mode as a Single Duel opponent, unlocked by finishing Story Mode's Chapter 1.
Big Core MK-2 was also a downloadable Ghost Duelist during December 2010.