Martian Man vs Grover Underwood: who would win?

Martian Man favored — Favored (~65%)

Martian Man · Invincible · Base

Tier

8-C

Attack Potency

Building Level

Speed

Relativistic

Durability

Multi-Continent Level

Grover Underwood · Percy Jackson · Base

Tier

8-C

Attack Potency

Building Level+

Speed

Superhuman, up to Massively Hypersonic+

Durability

Building Level+

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