To be fair, the White Knights do essentially exist IRL. (The Phantom Beasts were directly based on them.) That being said, I'd say it's most likely his VWXYZ deck showing up here. It's the only one of his decks not represented in Duel Links. (He also used them briefly during that arc for what it's worth. But he used basically everything there.)
Also worth noting that the deck they gave him for that duel in Legacy of the Duelist (which uses decks specifically based on specific duels for various characters and lets you "recreate" them), gave him an extremely bland LIGHT Normal Monster deck to stand in for this. (The fact it had Metaphys Armed Dragon is the only thing that even hinted at it being a Chazz deck, though.)
Anoymous
