FusionDex

The ring above Arckern's head adjusts its position to absorb the most sunlight possible at any given time. If in danger, the ring responds instinctively and fires off the stored energy in a blazing Solar Beam attack.

Arckern try to minimize movement to conserve the nutrients they have stored in their bodies for evolution. It is described in mythology as the Pokémon that shaped the universe with its 1,000 arms.