Inscrutable and nearly unstudiable, Deoxy’s DNA mutates on the fly as dramatically as Ditto’s. Nobody knows why they crash on Earth, or why they seek out other meteors when they land.
Pokéfeature: Deoxys can change forme when it comes into contact with meteorites.

When Deoxys wants to attack, the mass at the end of its tentacles becomes one hundred times denser than near its core. With this power, it could pierce a battleship’s hull.

When Deoxys wants to defend, it pours its body over its core again and again. The resulting form is so hard that you could drive a dump truck into it without a scratch.

When Deoxys wants to move, it sheds all of its matter into ‘propulsion points’ along its body. In this lightweight form, Deoxys could fly around the globe in 12 hours.