Rarity vs Adamantoise: who would win?

Too close to call

Rarity · My Little Pony · Possessed by a Spell Book

Tier

2-A, up to LOW 1-C

Attack Potency

Multiverse Level+, up to Low Complex Multiverse Level

Speed

Subsonic

Durability

Multiverse Level+, up to Low Complex Multiverse Level

Adamantoise · Final Fantasy · Base

Tier

2-A

Attack Potency

Multiverse Level+

Speed

Superhuman, up to Massively Ftl+

Durability

Multiverse Level+

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