Zapper vs Oscar Pine: who would win?

Zapper favored — Slight edge (~55%)

Zapper · Undertale · Base

Tier

8-A

Attack Potency

Multi-City Block Level

Speed

Speed Of Light, up to Ftl

Durability

Multi-City Block Level

Oscar Pine · RWBY · Haven/Post-Haven

Tier

8-A

Attack Potency

Multi-City Block Level

Speed

Massively Hypersonic

Durability

Multi-City Block Level

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