Shin Godzilla:
Abilities: Adaptation (unavailable in this match), Durability, Phased-Array Radar, Powerful Tail, Radiation Absorption/Emission, Radiation Heat Ray, Regeneration, Smoke Breath, Thermal Flame.
Height: 118,5 meters
Length: 333 metres
Weight: 92 000 tons
Weaknesses: Extremely slow and lacks agility of his 3rd form. His back is skinless and vulnerable to piercing/explosive attacks. Overheats after a couple of minutes of continuous using of his energy-based attacks.
Mother Legion:
Abilities: Burrowing, Interference Wave Claws, High Brand Electronic Eyes, Microwave Shell, Physical Strength, Red Rod (only if the horn is destroyed), Scythe Legs, Sharp Horn, Sledge Arms, Symbiotic Legion Summoning.
Height: 140 meters
Length: 160 meters
Weight: Scaled to 168 000 tons
Weaknesses: Isn't very durable herself. Her Interference Wave Claws are vulnerable to Anti-Tank Missiles. Ultimate Plasma.
Who would win?