Link (Game & Watch) vs Shion (Web Novel): who would win?

Link (Game & Watch) favored — Slight edge (~55%)

Link (Game & Watch) · The Legend of Zelda · With the Triforce

Tier

3-A

Attack Potency

Universe Level

Speed

Massively Hypersonic+, up to Relativistic+

Durability

Universe Level

Shion (Web Novel) · Tensei Shitara Slime Datta Ken · Afterstories

Tier

3-A

Attack Potency

Universe Level

Speed

Transonic, up to Massively Ftl+

Durability

Universe Level

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