Earl of Lemongrab 3 vs Kaiju No. 13: who would win?

Kaiju No. 13 favored — Favored (~65%)

Earl of Lemongrab 3 · Adventure Time · Base

Tier
HIGH 7-A
Attack Potency
Large Mountain Level
Speed
Superhuman
Durability
Small Building Level, up to Large Mountain Level

Kaiju No. 13 · Kaiju No. 8 · Base

Tier
7-A
Attack Potency
Mountain Level+
Speed
High Hypersonic, up to High Hypersonic+
Durability
Mountain Level+, up to Island Level

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