The Blue Coast Zone ends with a boss battle against an unnamed buggy, piloted by Eggman Nega. The vehicle resembles a dragster with a giant spike ball attached to it's front. The spike ball is the main offensive weapon of the vehicle.
As the players chase it, the vehicle attacks by swinging the spike ball left and right. It will also charge up and thrust itself at the players very quickly. At certain points, the spike ball will move to the top of the vehicle, leaving Eggman Nega's cockpit exposed, and giving the players an opportunity to attack. Players can deal damage by either using Homing Attack, Spin Attack, or by jostling the cockpit. After six hits from one player, the vehicle is destroyed, and the fight is won.
The challenge in the fight comes from warding off the other player, who will be trying to score six hits of their own.