For the similarly named Sonic 3D Blast level named "The Final Boss" ("The Final Fight" in its 16-bit version), see The Final Fight.

The final boss is a character that appears in Sonic Blast. It was a remotely-controlled combat robot created by Dr. Robotnik. It was used by the doctor to combat Sonic and Knuckles in their final showdown onboard the Silver Castle.


The Final boss is an egg-shaped robot with a monitor where displays of Robotnik's face can be seen. The robot consists of an upper and lower half. Each half is divided by a jagged line formed by triangle-shaped edges that double as saw blades. The upper half includes the monitor, two lines of yellow armor lines on each side, and a yellow command board. This half also has two long drills that protrude from its top as horns after the separation process. The lower half includes an edge painted in red, a yellow ring hanging from the front, a yellow center inside the lower half, and rocket exhausts on the sides. Color-wise, the upper half of this robot is mostly white while the lower half is almost completely black. It also has yellow and black hazard stripes on the sides of the lower half.


Sonic Blast

In Sonic Blast, Dr. Robotnik used this robot to attack Sonic and Knuckles after the heroes destroyed his previous vehicle. In spite of Robotnik's efforts though, his robot got destroyed by the two heroes in the end, causing the entire Silver Castle to fall into the ocean.

Powers and abilities

Robotnik's robot can separate itself into two autonomous parts. By repositioning and moving the cracked extremities of the edges of each half of its body segments around, the robot can turn its edges into spinning sawblades. It can also protrude deadly drills from the top of its upper half. Its upper half can as well drop harmful blue energy balls from its bottom. Both its halves are also capable of independent flight.


Robotnik's robot is the final boss of Sonic Blast. The player fights it at the end of Silver Castle Zone Act 3 after defeating the previous boss with all five Chaos Emeralds in their possession.

Boss guide

After the player destroys the previous boss, its boss arena will self-destruct. A flash of white will then bring the playable character to the final boss's arena, with all the Rings they had at the end of the previous boss battle in their possession. There, the player will find the final boss waiting. Robotnik will then take control of the robot, activating its saw blades and horns before separating it into two halves. The boss fight will then begin, with the boss's upper half floating above the arena.

During the entire fight, the boss's two halves will move leftward, rightward, or not at all. These halves also move independently of each other (meaning one half's change of movement will not necessarily affect the other). Touching the sawblades or drill horns on the boss will make the playable character take damage. The upper half of the boss will also be doing most of the attacking by dropping drop blue energy balls straight downward. Also, after taking damage, the boss will retaliate by releasing four blue energy sparks with equal space between them that will shower down on the arena.

The top of the upper half of this robot is the boss's vulnerable point. However, for as long as Robotnik's face is displayed on its monitor, any of the playable character's attacks will simply bounce off this spot. In order to disarm its defensive shell, the player must first jump on the yellow center on the boss's lower half. For a few brief seconds afterward, the monitor on the upper half of this boss will display an arrow pointing upward. Circumnavigate the spiky protrusions on the boss's upper half to land a hit before Robotnik's face returns, and be ready to dodge the ensuing shower of blue sparks when landing. After six hits, the lower half of the boss begins rolling along the ground, making the fight even more difficult. Land six more hits (for a total of twelve hit) to defeat this boss.

After being defeated, the final boss will blow up before disappearing in a flash of white, clearing the Act. The Good Ending will play afterward, which shows the Silver Castle sinking into the ocean as a result of the destruction while the playable character is shown holding all the Chaos Emeralds.


Name Artist(s) Length Music Track
N/A Kojiro Mikusa 1:25
Final boss blast


  • This boss's separation ability is a visual gag of an actual egg cracking in two, even showing the egg yolk in the form of a golden half-sphere inside of it. The choice of an egg for this robot's design is also a reference to its creator's Japanese name: Dr. Eggman.
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