The dangerous cloning experiments carried out by Megatron have created another powerful ally for the heroic Maximals: Sonar. Super-acute senses provide matchless reconnaissance abilities, while bio-cyber elements allow unmatched strength and mobility. When combined with a fiery, almost uncontrallable aggression, Sonar makes a dangerous enemy and somewhat unpredictable ally. Much to his chagrin, Megatron has unintentionally created the finest early warning system ever to have existed - the Maximal known as Sonar!
Sonar appeared in the following 6 comic books: