Celestial Towers vs Meganula: who would win?

Meganula favored — Slight edge (~55%)

Celestial Towers · Terraria · Base

Tier

HIGH 5-A

Attack Potency

Brown Dwarf Level

Speed

Immobile, up to Subsonic+

Durability

Brown Dwarf Level

Meganula · Godzilla · Meganula

Tier

HIGH 5-A

Attack Potency

Brown Dwarf Level

Speed

Superhuman

Durability

Brown Dwarf Level

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