Kamen Rider Black RX vs Mimir: who would win?

Kamen Rider Black RX favored — Slight edge (~55%)

Kamen Rider Black RX · Kamen Rider · End of Series (41-47)

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Transonic, up to Immeasurable

Durability

Complex Multiverse Level

Mimir · God of War · Base

Tier

1-C

Attack Potency

Complex Multiversal

Speed

Immobile, up to Immeasurable

Durability

Complex Multiversal

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