Gargantuar Prime vs Promathia: who would win?

Promathia favored — Slight edge (~55%)

Gargantuar Prime · Plants vs. Zombies · Mech Gargantuar

Tier

2-C

Attack Potency

Low Multiverse Level

Speed

Massively Hypersonic, up to Relativistic+

Durability

Low Multiverse Level

Promathia · Final Fantasy · Shinryu

Tier

2-C

Attack Potency

Low Multiverse Level

Speed

Ftl

Durability

Low Multiverse Level

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