Sonic Underground (1999)

S01E37 Bartleby the Prisoner

Robotnik has unleashed his latest creation, Art, to enforce a ruthless eradication policy in Robotropolis. Art's mission is clear: eliminate everything in his path, including Sonic, Manic, and Sonia. This massive robotic menace appears invincible until he unexpectedly picks up on the enchanting tunes played by the Underground band.