Green Grove Zone boss

Eggmobile (spike ball dropper) is the first boss encountered in Sonic 3D in Green Grove Zone, piloted by Dr. Robotnik.

In the arena, Robotnik reveals himself and lowers towards a height which Sonic cannot reach by jumping, with a spike ball equipped on the bottom of his Eggmobile. He will fly around the room trying to stay in Sonic's path, and will drop the spike ball which will partially follow Sonic or home in on him. Once Robotnik lowers his Eggmobile to retrieve the spike ball, this is the chance to attack.