Leo's Decks

Deck
{| style="float:right;" border="1" width="30%" ! colspan="2" style="background: #00FF00; text-align: center;" | Record
 * Opponent || Outcome
 * Yusei Fudo || Lose
 * Greiger || Lose
 * Sayer || Lose
 * Devack || Win (assisted by Luna)
 * Dexter || Lose (school lesson)
 * Michel || Win
 * Lucciano || Lose (school lesson)
 * Lucciano || Lose (with Luna)
 * Devack || Win (assisted by Luna)
 * Dexter || Lose (school lesson)
 * Michel || Win
 * Lucciano || Lose (school lesson)
 * Lucciano || Lose (with Luna)
 * Lucciano || Lose (school lesson)
 * Lucciano || Lose (with Luna)
 * Lucciano || Lose (with Luna)
 * Lucciano || Lose (with Luna)

Leo plays a Morphtronic Deck that features an Archetype of monsters known as "Morphtronics" whose effects are dictated by battle position. The monsters' appearances are derived from various objects such as cell phones, pen drives, cameras and magnets. His Deck also specializes in summoning his strongest card, "Power Tool Dragon", and the use of Equip Spell Cards.

In Yu-Gi-Oh! 5D's Stardust Accelerator, he uses a deck called "Transform, ta-da!" This focuses on his Morphtronic Monsters, and also on Cyber Dragon and his two Chimeratech dragons. His Tag Force 4 deck again focuses on his Morphtronic monsters, but they serve as disruption until summoning Power Tool Dragon and using its effect.

During the 3rd Arc of the Series, at the Duel Academy, he uses Swordsman of Landstar (or possibly Comrade Swordsman of Landstar) and Marauding Captain. Though it is known that Leo was only using them at the time because the lesson is based on Warrior-Type monsters. So like Dexter their decks were revolving around this type of monsters for practice only.

In Season 2, like his Luna, Leo has a Deck for Turbo Duels as well.