Sonic the Hedgehog (Classic) vs Bruno (Fire Emblem): who would win?

Sonic the Hedgehog (Classic) favored — Slight edge (~55%)

Sonic the Hedgehog (Classic) · Sonic · Hyper Sonic

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Immeasurable

Durability

Complex Multiverse Level

Bruno (Fire Emblem) · Fire Emblem · Book I

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Superhuman, up to Massively Hypersonic+

Durability

Complex Multiverse Level

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