Rockstar Cookie is an S-grade cookie which while sliding, will shoot out note jellies. These can be collected for points and when fully charged, can destroy obstacles. One note jellies is equal to 8,220 points.
This Cookie is currently available in both versions of the game.
He's the only Cookie to discover rock and roll in the oven. His rock shows will knock your socks off. What makes his performances so stunning? He knows that practice makes perfect. Amidst ceaselessly tuning his style, he discovered the Slide Blast ability. He's a shining star amongst the Cookies.
Playing with this Cookie changes the background music while running. This is one of two Cookies with this ability, the other one being Mint Choco Cookie.
In August 2015, the background music for this cookie has been changed, along with more influence to the classic rock era.
If the cookie relay is used, the background music will go back to the usual music theme.
Uniquely, the combination pet Spotlight Fan, was not released at the same time but 15 days later. This was the first time in Cookie Run Line history where the cookie and its pet were released separately.
There is a treasure that is dedicated to give extra points to his note jelly. See: Sour Note Jelly
He is the only cookie that wasn't released alongside with his combination pet.
In the September 4, 2015 update, each Note Jelly now gives 8,220 points, up from 1,000. His Slide Blast also seems to charge slightly faster.