Fjorm vs Guilmon: who would win?

Guilmon favored — Slight edge (~55%)

Fjorm · Fire Emblem · Book II

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Superhuman, up to Massively Hypersonic+

Durability

Complex Multiverse Level

Guilmon · Digimon · WarGrowlmon X

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Massively Hypersonic+, up to Immeasurable

Durability

Complex Multiverse Level

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