- Not to be confused with Mega Mack.
The Mega Muck is a glutinous and thick green/brown substance made of one part petroleum, one part quicksand and one part clay mud. The Mega Muck is extremely sticky, capable of restraining even Sonic the Hedgehog's movements by gluing him to the ground or sticking his limbs together, and it takes at least the strength of a dragon to pull him free. Since a pool of it can immobilize Sonic in a manner of steps, the Mega Muck an ideal tool to slow the hedgehog down.
Robotnik used the Mega Muck against Sonic on a number of occasions. After reverting to his evil robotic personality, Uncle Chuck made a makeshift batch of Mega Muck to lure Sonic into a trap after kidnapping Tails and Antoine.