FusionDex

These odd Pokémon often make their nests near bodies of running water, even though their metal bodies can rust. Their bodies are strong enough to lift boulders, which they stack up along their nests to try and block most water.

If it senses the approach of a storm and a tidal wave, it protects its seaside nest by piling up boulders. The gear with the red core is rotated at high speed for a rapid energy charge.