Yuya vs Declan Round 1: A Yu-Gi-Oh Action Duel

Should've Declan be DQ'd because he used prototype cards?

D/D/D Doom King Armageddon
Pendulum Effect:
(Not known in the episode)
Effect:
If a monster you control leaves the field: This card gains ATK equal to that monster's original ATK until the end of this turn.

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