Harrison vs Mona: who would win?

Mona favored — Slight edge (~55%)

Harrison · Godzilla · Piloting Kiryu

Tier

5-A

Attack Potency

Large Planet Level

Speed

Superhuman, up to Massively Ftl+

Durability

Large Planet Level

Mona · Megami Tensei · Base

Tier

5-A

Attack Potency

Large Planet Level

Speed

Massively Hypersonic+

Durability

Large Planet Level

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