After a hypnotized Sonic beat their leader, he was made the new leader and then took off with them to a Mobian city, where the gang was pollinated by Robotnik's hypnotizing Mind Pollen. Tails quickly put earplugs in all their ears so they did not hear Scratch and Grounder's message, which would have made them accept Robotnik as their ruler. Tails then removed the earplugs from Sonic and told him who he really was. Sonic then was back to normal and decided to remove the earplugs from the Road Hogs and told them they are good hogs dedicated to stopping Robotnik.
The Road Hogs used their motorcycles to catch up to Scratch and Grounder and run their truck off the road while Sonic took care of Robotnik.