Isao Shinomiya vs Earl of Lemongrab 3: who would win?

Isao Shinomiya favored — Favored (~65%)

Isao Shinomiya · Kaiju No. 8 · Base

Tier
7-A, up to 6-A
Attack Potency
Mountain Level+, up to Continent Level
Speed
High Hypersonic+, up to Ftl
Durability
Mountain Level+

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

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