This boss is a large, armored robot that rolls around the arena, occasionally extending spikes or firing projectiles. The arena is a flat platform above a lava pit.
- Phase 1: The robot rolls back and forth, then stops to extend spikes or fire.
- Sonic Strategy: Wait for the robot to stop and expose its head (often after an attack). Jump and Spin Attack its head. Use your speed to dodge its rolling charges. An Insta-Shield can help you hit it safely.
- Knuckles Strategy: Knuckles can glide over the robot when it's rolling, then drop down for a punch when its head is exposed. His punch is powerful, making this fight relatively quick if timed correctly.
- Weakness: The robot's head.
- Reward: Clear Act 1, proceed to Act 2.