Unlike other Color Powers, the Black Bomb, along with the Black Wisp, only becomes available by obtaining it from Miiverse. It can also be rewarded to the player by completing any of the DLC stages (Nightmare Zone, Yoshi's Island Zone and The Legend of Zelda Zone) and by completing missions in the PC version.
When using the Black Bomb, the user transforms into a black, orb-shaped bomb. In Sonic's case, his version of the Black Bomb has a small round dish with an ignited fuse on top of him, while on the front his eyes and mouth can be seen which glow purple. However, his eyes have lost their pupils and his mouth has become wider with serrated sharp teeth.
Powers and abilities
As the Black Bomb, the user becomes a living and incredibly dense bomb. The user's body density becomes greatly increased which make them extremely heavy and virtually invulnerable, allowing them to flatten any enemy. Additionally, the user is able to induce widespread explosions by making themselves detonate without causing themselves harm. Additionally, they can built up a charge to increase the size and power of their explosions.
The Black Bomb's only known weakness is that it can only be used for a few seconds and requires more Hyper-go-on to be maintained.
In gameplay, the player can only use the Black Bomb while in possession of a Black Wisp. Transforming into the Black Bomb will cause the Wisp Gauge to start depleting, and once it runs out, Sonic will revert back to normal. The player can move the Black Bomb around by tilting the Wii U GamePad in the direction the player wants to move or by using the Left Stick.
As the Black Bomb, the player can instantly destroy enemies by rolling over them without any ill effects. Also, by destroying enemies, the Black Bomb will increase in size, thereby increasing its area of effect. Additionally, when the transformation is about to end (which is warned by the Black Bomb flashing red), Sonic reverts back to normal in a large explosion which will destroy all enemies caught within it. The explosion's area is determined by the Black Bomb's size.
Unlike other Wisps, the he Black Bomb does not have an icon on the screen to activate it, nor can its duration be increased by obtaining more Black Wisps.