Monkey D. Luffy (Pre-Timeskip) vs Kamen Rider Kuuga: who would win?

Monkey D. Luffy (Pre-Timeskip) favored — Slight edge (~55%)

Monkey D. Luffy (Pre-Timeskip) · One Piece · Enies Lobby Arc - Paramount War Saga

Tier

6-C

Attack Potency

Island Level, up to Island Level+

Speed

Relativistic, up to Relativistic+

Durability

Unknown

Kamen Rider Kuuga · Kamen Rider · Amazing Mighty Form

Tier

6-C

Attack Potency

Island Level

Speed

Superhuman, up to Hypersonic

Durability

Island Level

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.