Rocko is the tritagonist of The Pebble and the Penguin. He is a grouchy, streetwise, yet good-hearted Northern Rockhopper Penguin with red eyes, blond eyebrows, and a purple bandana. He is naturally offended by Hubie, but officially befriends him. Rocko's dream is to fly, but as everyone knows, penguins can't fly. However, Rocko does not accept it because he thinks it is a cruel joke. But he is the only resource to return Hubie to Antarctica and save Marina. He will go beneath them and start floating up like a superhero as to his dream.
He is voiced by Jim Belushi.