Cracking Knuckles

Having parted with Sonic and the others, Knuckles, the red-quilled echidna, who is taking independent action, hides in the city. There, he comes in contact with Robotnik, who claims that he wants to collect the Chaos Emeralds to return to their own world and apologizes for the evil deeds he has done until now, asking Knuckles to deal with Sonic. Knuckles is tricked by those words. It is then reported that an unidentified gem has been discovered. It turns out to be a trap Robotnik had made up, but Knuckles and Sonic's group fall for it. That's where Sonic and Knuckles begin their fight. After Knuckles realizes that Robotnik lied to him about wanting to live in peace, he teams up with Sonic to defeat him.

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S01E06 - Techno Teacher