Finn the Human vs Arc-Gurren Lagann: who would win?

Finn the Human favored — Slight edge (~55%)

Finn the Human · Adventure Time · Two Swords - Elementals Arc

Tier

5-A

Attack Potency

Large Planet Level

Speed

Ftl+

Durability

Large Planet Level

Arc-Gurren Lagann · Tengen Toppa Gurren Lagann · Base

Tier

5-A

Attack Potency

Large Planet Level

Speed

Sub-Relativistic+, up to Massively Ftl+

Durability

Large Planet Level

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