Ras Nsi vs Boo: who would win?

Boo favored — Slight edge (~55%)

Ras Nsi · Dungeons & Dragons · Base

Tier

HIGH 8-C, up to 8-A

Attack Potency

Large Building Level, up to Multi-City Block Level

Speed

Relativistic+, up to Ftl+

Durability

Large Building Level, up to Multi-City Block Level

Boo · Super Mario Bros · Big Boos

Tier

HIGH 8-C

Attack Potency

Large Building Level

Speed

Massively Ftl+

Durability

Large Building Level

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