Clone Force 99 originated as a batch of clones who were born with "desirable" genetic mutations that made them superior soldiers. These mutations also had the unique effect of altering their appearance and voice greatly from regular clones. Due to their genetic mutations, unorthodox fighting tactics, and gung-ho behavior, they were nicknamed the "Bad Batch" within the Clone Army. The squad worked with Commander Cody on certain occasions, but did not report to anyone.
- Hunter - Leader/Tracker
- Tech - Computer Expert/Technology Expert
- Wrecker - Weapons Expert/Demolitions Expert
- Crosshair - Sniper
- Echo - 
- Star Wars: The Clone Wars – "The Bad Batch" (First appearance)
- Star Wars: The Clone Wars – "A Distant Echo"
- Star Wars: The Clone Wars – "On the Wings of Keeradaks"
- Star Wars: The Clone Wars – "Unfinished Business"