Because of both the difference in size and the quantity of crystals covering their bodies, the Paru couldn't utilize lightning as well as Giganto Zillas.
Through using the limbs protruding from his back as lightning rods, about half of the energy had been dissipated.
The other half filled his body, sending his cells into overdrive.
If the surplus of energy isn't used within one minute, his cells would succumb and start burning, eventually dying.
The Paru had no intention of letting something like that happen, but the feeling of wielding the energy of lightning made him so ecstatic that he wished it would last longer.
The energy coursed through his skin, muscles, bones, and cells, powering and firing them up.