The Self-Propelled Bomb is a black bomb with a red ring around it and white eyes without pupils.
In Sonic the Hedgehog 3 and the lock-on game Sonic the Hedgehog 3 & Knuckles, the Self-Propelled Bomb is a power-up that only appears in Competition Mode. Self-Propelled Bombs are found inside of bubbles that float and rotate around one point of each Zone.
When the player obtains this item, it begins to move to the left at a tremendous speed. If any player hits the Self-Propelled Bomb, the bomb will explode and make its target take damage.