Kyubey vs Rockhoof: who would win?

Kyubey favored — Slight edge (~55%)

Kyubey · Puella Magi Verse · Base

Tier

10-C

Attack Potency

Below Average Human Level

Speed

Massively Hypersonic

Durability

Below Average Human Level

Rockhoof · My Little Pony · Base

Tier

10-C, up to 6-B

Attack Potency

Below Average Human Level, up to Country Level

Speed

Subsonic

Durability

Below Average Human Level, up to Country Level

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