Ep. 35: A Sea of Troubles, Part 1

35

Yuma and co. take the Different Dimension Airship to the bottom of the ocean! However, when they end up caught up in a storm, Rio goes missing! Ryouga, in search of Rio, is lured to the bottom of the ocean, and what waits there is the ruins Yuma and Astral were looking for! Ryouga is guided by someone to the depths of the Ruin, and what waits there is his sister Rio, being manipulated by Abyss, the Spirit of the "Number"...! (Source: Yu-Gi-Oh! Wiki)