Gear 5's reality-warping is the best counter to Saitama's punch, but the gag character still wins.
This is actually one of the more interesting Saitama matchups because Gear 5 Luffy operates under cartoon logic โ he can reshape reality, turn the ground to rubber, and fight with Looney Tunes physics. This is potentially a counter to Saitama's straightforward 'punch harder' approach.
If Saitama punches Luffy, does the rubber body absorb it? Does Gear 5's cartoon physics turn the punch into a visual gag? These are genuinely interesting questions that don't have clear answers because both characters operate outside normal power scaling.
However, Saitama's power is designed to exceed any defense. His serious punch casually negated a galaxy-level attack. Gear 5's cartoon physics, while unpredictable, haven't demonstrated that level of force resistance. Luffy's durability is impressive but has limits โ Kaido hurt him repeatedly.
Gear 5's Nika powers operate under cartoon logic that could potentially counter Saitama's straightforward punching. Luffy's rubber body absorbs blunt force. His Conqueror's Haki adds a dimension of power that bypasses physical defenses. The unpredictability of Toon Force makes this harder for Saitama than most fights.
Saitama's serious punch casually negated galaxy-level attacks. His power is narratively infinite โ designed to exceed any defense. While Luffy's Toon Force is impressive, Saitama himself operates as a meta-character whose strength is 'whatever it needs to be to win instantly.'
Saitama wins, but Gear 5 Luffy makes this more interesting than almost any other Saitama matchup. The Toon Force vs. One Punch meta-power dynamic is genuinely fascinating, but Saitama's narrative invincibility ultimately trumps Luffy's cartoon physics.
Monkey D. Luffy also fights
Saitama also fights