Mumbo vs Phaneroplus: who would win?

Phaneroplus favored — Favored (~65%)

Mumbo · DC · Base

Tier
LOW 7-C
Attack Potency
Athlete Level, up to Small Town Level
Speed
Relativistic
Durability
Athlete Level, up to Small Town Level

Phaneroplus · Kaiju No. 8 · Honju

Tier
LOW 7-C
Attack Potency
Small Town Level
Speed
Subsonic
Durability
Small Town Level

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