Jaden Yuki and Alexis Rhodes vs. Chancellor Sheppard and Ms. Dorothy

Jaden Yuki and Alexis Rhodes vs. Chancellor Sheppard and Ms. Dorothy
Sheppard's turn
■Activates "Polymerization", fusing two "Cyber Ogres" to Fusion Summon "Cyber Ogre 2" (2600/1900) in Attack Position.
■Sets a card.
Alexis' turn
■Summons "Etoile Cyber" (1200/1600) in Defense Position.
■Sets a card.
Ms. Dorothy's turn
■Summons "Marshmallon" (300/500) in Attack Position.
Jaden's turn
■Activates "Polymerization", fusing "Elemental Hero Necroshade" and "Elemental Hero Sparkman" to Fusion Summon "Elemental Hero Darkbright" (2000/1000) in Attack Position.
■Attacks "Marshmallon" (Sheppard/Dorothy 2300)
■Activates Quick Play Spell Card "De-Fusion", sending "Darkbright" back to the Fusion Deck and Special Summoning "Necroshade" (1600/1800) and "Sparkman" (1600/1400) in Attack Position.
■Attacks "Marshmallon" with "Sparkman" (Sheppard/Dorothy 1000).
■Attacks "Marshmallon" with "Necroshade" (Sheppard/Dorothy 0).
■Jaden and Alexis win