Mumbo vs Plant Monsters: who would win?

Plant Monsters favored — Slight edge (~55%)

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

Plant Monsters · Godzilla · Base

Tier

8-A

Attack Potency

Multi-City Block Level+

Speed

Immobile, up to Supersonic+

Durability

Multi-City Block Level+

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