Massimo Volpe vs Gagagigo: who would win?

Gagagigo favored — Favored (~65%)

Massimo Volpe · JoJo's Bizarre Adventure · Enhanced

Tier
9-B, up to 8-C
Attack Potency
Wall Level, up to Building Level+
Speed
Hypersonic+
Durability
Wall Level, up to Building Level+

Gagagigo · Yu-Gi-Oh! · Gogiga Gagagigo

Tier
8-C
Attack Potency
Building Level
Speed
Supersonic
Durability
Building Level

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