Even though Rockhopper does have a hat, it is not buy able for users of Club Penguin and therefore the only answer given is that Rockhopper's hat is on Rockhopper's head.
club penguin how to get rockhoppers hat and beard
you get it on rockhoppers ship on coins for change
go to rockhoppers boat and press on the clothes and you can get your free hat
rockhoppers ships in the telescope at the beacon on club penguin and on March 5th he will be at the beach
rockhoppers ship once sank
Rockhoppers password is migrator but be careful you might get BANNED!!!
the migrator
blablanla
Yarr.
You cannot yet go to Rockhoppers Island on Club Penguin.
Rockhopper's puffle is a red puffle on club penguin and is named Yarr
the migrator