Grey Matter

Grey Matter is the smallest alien in the Omnitrix. Standing at a mere 5 inches tall, he can be easily squashed. But surprisingly, he is extremely agile and can easily stick or slide down any surface. He also has flexible bones to squeeze into tight spots or escape from his enemies. He is also the smartest alien in the Omnitrix as he can easily operate or sabotage any machine or create a new one with just spare parts or machinery.