Rockhopper is a pirate who sails to the island mostly after The Migrator. He is always accompanied by his Puffle Yarr. You can also get a stamp for being in the same room as him. His ship is only docked at the beach only on special parties or events. He keeps a journal of his adventures, and sells items brought over from Rockhopper Island. When he comes to the island, he gives away a free item and sells other to members in his catalog. Penguins can sometimes see Rockhopper in random places in random servers whenever he docks his ship. His favourite game is Mancala. Players can receive a free gift from him by clicking what is usually the "Add Buddy" icon on his player card. This free gift was an Eyepatch before 2007. After that, it was a background. He and Aunt Arctic tie as the 3rd Mascot you can add to your buddy list. During February 2012, he hosted the "Rockhopper's quest".
He first visited Club Penguin when Yarr, his puffle, spotted it at the Crow's Nest with a telescope. He thought there might be penguins, so he made the Alien Antenna. He discovered Yarr at Rockhopper Island. Apparently, he never knew life existed on his island except himself. Also, during a future period when Rockhopper left Club Penguin, he wasn't alone. Someone stayed on the ship to have adventures with him. That penguin is Bambadee.