Eren YeagervsKing Kong

This is a kaiju-scale battle between two iconic giants. King Kong, in his Monsterverse incarnation, stands around 337 feet tall, possesses incredible strength and intelligence, and has fought Godzilla to a near-standstill with the help of the Battle Axe. He's strong enough to rip apart Skullcrawlers, intelligent enough to use tools and tactics, and durable enough to survive massive falls and energy attacks.

Eren Yeager in his Founding Titan form is a different kind of monster entirely. The Founding Titan is over 850 feet tall in some depictions, with the ability to command all other Titans through the Coordinate. This means Eren doesn't fight alone — he brings an army of Colossal Titans, each 200 feet tall and generating enough heat to destroy entire cities. Eren's War Hammer Titan abilities let him create weapons from hardened crystal, and his Attack Titan's fighting instinct makes him a capable combatant.

Kong's intelligence is his greatest asset. He's shown tactical thinking, tool use, and the ability to adapt mid-fight against opponents much larger than himself. The Battle Axe, charged with Godzilla's energy, gives him a weapon capable of devastating damage. But facing an opponent who can spawn additional Titans and regenerate from damage is a fundamentally different challenge.

The regeneration factor is critical. Titan shifters heal rapidly, and the Founding Titan's healing capabilities are extraordinary. Kong can deal massive damage, but Eren will regenerate from it. Kong cannot.