Rockhopper's island is not proved to be a real room in club penguin. Although there are to most famous rumours on how to get to Rockhopper's island -
1. Be on Rockhopper's ship when he is leaving.
2. Cross level 25 of the game Hydro Hopper.
Chat with our AI personalities
yes there is a puffle island on club penguin so go find it
The migrator always stays with Rockhopper, whether he is on Rockhopper island or on the club penguin island. Currently (April 2013), the migrator is with Rockhopper on Rockhopper island, but when he'll come to club penguin, he'll be sailing on his migrator.
You must meet them on the island.
The first Puffle introduced on Club Penguin was the Blue Puffle. This Puffle was available to all Club Penguin users, including non-members. Also, the second Puffle on Club Penguin was the Red Puffle. This Puffle was brought by the notorious Captain Rockhopper, a celebrity on Club Penguin. They are a special breed of Puffle, originating from Rockhopper Island. This Puffle too, was available to all Club Penguin users.
Not on the current Club Penguin but I think that they have old Club Penguin on Penguin Chat.