Bouncy Boss Robot, known as Hopping Egg Vulcan (ホッピング・エッグバルカン) in the Japanese manual, is the third boss of Sonic Chaos, fought at the end of Sleeping Egg Zone.
In keeping with the Pogo Spring theme of the Zone, the Bouncy Boss Robot is a bouncing, gun-toting, Eggman-look-a-like robot. This machine can actually provide some problems, as only the head is vulnerable, and the speed of its bouncing is such that landing a strike takes some work. All the while, the boss' Vulcan cannon spits bullets in Sonic or Tails's direction, making it ever harder to land a hit.
After eight hits in the Master System version, or five hits in the Game Gear version, the player will destroy the boss and move on to Mecha Green Hill Zone.
Artwork from the Japanese manual