The FlashvsGoku

This is genuinely one of the most debated matchups in all of fiction, because both characters are ludicrously fast — but fast in different ways.

The Flash doesn't just move fast — he's connected to the Speed Force, an extradimensional energy source that lets him break physics entirely. He can vibrate through matter, steal speed from other objects, create time remnants, and accelerate to speeds where time stops. The Speed Force operates outside conventional physics in ways that ki-enhanced speed doesn't.

Goku's Ultra Instinct provides autonomous combat at speeds beyond thought. But the Flash has literally outrun the concept of death and run faster than instantaneous teleportation. The Speed Force's upper limits are genuinely infinite.

However, Flash's attack power — while boosted by the Infinite Mass Punch — doesn't approach Goku's universal-tier ki attacks. Flash can hit fast but can't hit as hard. This creates a weird scenario where Flash is too fast to hit but might not hit hard enough to win.