Asta (Final Saga) vs Gigan (Godzilla Anime Trilogy): who would win?

Asta (Final Saga) favored — Slight edge (~55%)

Asta (Final Saga) · Black Clover · Judgment Day Arc

Tier

5-C, up to LOW 5-B

Attack Potency

Moon Level+, up to Small Planet Level

Speed

Massively Ftl

Durability

Moon Level+, up to Small Planet Level

Gigan (Godzilla Anime Trilogy) · Godzilla · Base

Tier

LOW 5-B, up to 5-B

Attack Potency

Small Planet Level, up to Planet Level

Speed

Superhuman, up to Relativistic+

Durability

Small Planet Level, up to Planet Level

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