Luffy starts off strong with his "Supreme Ultimate Gear Second Haki-Infused Red Hawk", but Saitama counters with his "Serious Punch of the Infinite One-Punch Power".
Undeterred, Luffy unleashes his "Ultra-Instinct Boundless Gear Fourth Elephant Gun Cannonball of Destruction", which shakes the very foundation of the battlefield. Saitama matches it with his "Consecutive Serious Punches of the Omnipotent Strength", pummeling Luffy with rapid-fire punches.
As the battle intensifies, Luffy activates his "Divine Awakening Gear Fifth, Sixth, and Seventh Sacramental God Mode", becoming a nearly unbeatable force. Saitama responds with his "Serious Series: Serious Side Hops and Serious Leaps of the Infinite Omnivannishness", dodging Luffy's attacks with ease.
Finally, Luffy unleashes his ultimate move, the "Devil King God Mode Gear Eighth Kamikaze Red Hawk Supreme Ultimate Haki-Infused Fist of the All-Consuming Destruction". Despite Saitama's attempts to evade it with his "Infinite Jumping Technique of the Immovable Bald Head", he ultimately gets hit and sent flying off the battlefield.
The winner of the battle is Luffy, who emerges victorious over the mighty Saitama.