Kūgo Ginjō vs Prismatic Dragon: who would win?

Prismatic Dragon favored — Slight edge (~55%)

Kūgo Ginjō · Bleach · Lost Agent Arc

Tier

HIGH 6-A, up to 4-A

Attack Potency

Multi-Continent Level, up to Multi-Solar System Level

Speed

Massively Hypersonic

Durability

Multi-Continent Level, up to Multi-Solar System Level

Prismatic Dragon · Dungeons & Dragons · Mature Adult

Tier

HIGH 6-A, up to 2-A

Attack Potency

Multi-Continent Level, up to Multiverse Level+

Speed

Relativistic+, up to Infinite

Durability

Multi-Continent Level, up to Multiverse Level+

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