These Dragon Balls have their own set of Shadow Dragons
Dark Dragon Balls are a set of dark red Dragon Balls with a black colored star. Uniquely each ball possesses the ability to merge with an evil entity to power them up, along with their ability to grant a wish when gathered. If a host of a Dark Dragon Ball is defeated, but the Dark Dragon Ball is not removed in time, the Dark Dragon Ball will cause the host to undergo a Dark Evolution.
It is revealed in the Super Dragon Ball Heroes: Dark Demon Realm Mission! manga that they were created by Demon Gods in order to revive Mechikabura with the aid of a Time Breaker Namekian. After their creation by the Time Breaker Namekian, Towa aims to collect all of the Dark Dragon Balls so that Mechikabura can use them to wish for youth. However, they scatter through space and time before they can be used. The Time Breakers then begin to collect them, coming into conflict with the Time Patrollers along the way.
When all seven are gathered they can be used to summon Dark Shenron.
In the SDBH1 opening, Trunks: Xeno tries to recover the One-Star Dark Dragon Ball from Frieza: Xeno but Demon God Towa appears and steals it from them. In the SDBH2 opening, Demon God Gravy attacks Cell: Xeno to retrieve the Two-Star Dark Dragon Ball but Goku: Xeno appears and interrupts his actions. In the SDBH3 opening, Demon King Dabura tries to obtain the Three-Star Dark Dragon Ball from Majin Buu: Xeno but he is stopped by the Time Patrollers and the new Demon Avatars. At a later point he absorbs Janemba: Xeno with the Dark Dragon Ball still merged. In the SDBH4 trailer, the Dark-Masked King and Turles: Xeno battle each other and the Dark Masked King succeeds in retrieving the Four-Star Dark Dragon Ball from Turles. In the SDBH5 opening, Demon God Shroom attempts to retrieve the Five-Star Dark Dragon Ball from Janemba. In the SDBH6 opening, whilst in possession of the Six-Star Dark Dragon Ball, Slug: Xeno undergoes a Dark Evolution transformation via Towa's magic to grant him the power to defeat the Time Patrollers before him. In the SDBH7 opening, Broly merged with the Seven-Star Dark Dragon Ball and ends up in a three-way battle with Mira and Goku.
The Dark Dragon Balls are seen merged with following villains:
- One-star Dark Dragon Ball: Frieza
- Two-star Dark Dragon Ball: Cell
- Three-star Dark Dragon Ball: Majin Buu
- Four-star Dark Dragon Ball: Turles
- Five-star Dark Dragon Ball: Janemba
- Six-star Dark Dragon Ball: Lord Slug
- Seven-star Dark Dragon Ball: Broly
- Mechikabura wishes to be restored to his prime.