I found out how to actually get Pinky. You have to play as Pac-chicken and eat 200 pellets. In PAC-MAN (the game) each pellet it worth 1 point and each cherry is
Pac-Man and pals invade "Crossy Road" in free iOS update
I Wish “Shooty Skies” and “PAC-MAN 256” Were More Like “Crossy Road” – AppUnwrapper