Dr. Ronald McDonald is transforming all potatoes into evil robotic french fries! Try and save the day as Blue Potato in Sonic 2 â Blue Potato the Mcdonalds! Sonic 2 â Blue Potato the Mcdonalds is a funny joke hack in Sonic 2 made by Blue Potato (or Sonic Cj). Although the game was made just for fun and jokes, it does feature some nice gameplay including new fast-food themed levels and characters. Will you be able to complete all levels and save all potatoes before they turn into some evil fries? Defeat Ronald McDonald and save the day in this fun hack!