Reginald Kastle's Decks

Anime
Ryoga's Deck consists of monstrous looking sea creatures such as sharks and krakens. He utilizes a Burn and Beatdown strategy in order to quickly gain the advantage through cards such as "Aero Shark" and "Explosive Urchin", with a focus on using Level 3 monsters to Xyz Summon Rank 3 Xyz Monsters.

Manga
Ryoga's manga Deck is, so far, identical in appearance and function to his anime Deck, having the same strategy.