Mina Mathers vs Shuckle: who would win?

Mina Mathers favored — Slight edge (~55%)

Mina Mathers · Toaru Majutsu no Index · Reading Thoth 78

Tier

7-A

Attack Potency

Mountain Level

Speed

Unknown

Durability

Mountain Level

Shuckle · Pokémon · Base

Tier

7-A, up to 6-C

Attack Potency

Mountain Level, up to Island Level

Speed

Massively Hypersonic+

Durability

City Level, up to Island Level

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