Sir Pentious vs Rotom-Dex: who would win?

Rotom-Dex favored — Favored (~65%)

Sir Pentious · Hazbin Hotel · Sinner Demon

Tier
9-B, up to 8-C
Attack Potency
Building Level
Speed
Subsonic+
Durability
Building Level

Rotom-Dex · Pokémon · Base

Tier
9-B
Attack Potency
Wall Level+
Speed
Ftl
Durability
Island Level

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