Big Arm is the final boss of Sonic the Hedgehog 3.
Big Arm

Big Arm's sprite from Sonic the Hedgehog 3


  • In Sonic & Knuckles and Sonic 3 & Knuckles, Sonic and Tails don't battle Big Arm, but Knuckles does.
  • Big Arm is also a boss in the Nintendo 3DS version of Sonic Generations.

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