Robotnik's Rival

"Robotnik's Rival" is the 36th episode of Adventures of Sonic the Hedgehog.

Plot
Dr. Robotnik and a rival scientist named Dr. Qwark try to cooperate in capturing Sonic. At first they are successful, but due to Scratch and Grounder's incompetence, Sonic and Tails get away. A stream of attempts from Sonic to make the two doctors hate each other (along with Scratch and Grounder tricking Qwark's super-intelligent robot, D.U.F.U.S., into turning against its master) eventually results in their failure.

Sonic Sez
Robotnik and Doctor Qwark have a race and Sonic explains that it is bad to cheat.