Mindjack

Mindjack is a Neurolinaean from the planet Neurax in Ben 10: Planet Defender.

Appearance
He doesn't look too different from a human, but he has hands that can transform into a syringe. The Omnitrix symbol is on his hand.

Powers and Abilities
His syringe can extract and inject memories and powers, which he can use. He can also absorb energy and store matter in his syringe by converting it to energy.

Weaknesses
Just about anything that would kill a normal human.

Trivia

 * This was the first alien I ever thought of.
 * Trivia 2