User blog comment:Goddess of Despair/Comics vs Video Games Part 2: Pikachu vs Lockheed/@comment-4552610-20130217164738/@comment-24180428-20130217192924

The shock is the primary focus here. Pikachu's power is more shock then heat, which is why it does electric damage and not fire. Lockheed would not have resitence to much of Pikachu's electricity. I would imagine that his enhanced durability would be a better defence then resitence to heat.