Experiment 610 was the 610th genetic experiment created by Jumba with Hämsterviel's funding. She was designed to be an evil witch. 610 and the other first 624 experiments were deactivated and smuggled to Earth by Jumba during his mission to capture Experiment 626.
All of the experiment pods were released and scattered across the island of Kauai.
Hämsterviel took possession of Witch and reprogrammed her to be able to possess humans to enhance her abilities. She was sealed in a box and released when Yuna and Jessica opened it. She possessed Jessica afterwards and turned her into an evil witch. After a tough battle, Witch was surrounded with six mirrors, forcing her out of Jessica and into Jumba's capture container.
When Witch turns Jessica into an evil witch, Jessica's hair turns grey and her eyes turn light purple. She also wears an orange dress with a small black jacket, as well as black gloves with black boots.
When Witch transforms Jessica into her demonic form, her hair has a little more twist. Her arms and legs grow purple fur with claws. She now wears the black dress with an extra red skirt. This time she grows a tail and bat-like wings. There is also a red color around her eyes.
Witch is a purple bat/ghostlike experiment. The back of her head is shaped like a cone and is curved at the bottom resembling a witch hat, her ears are small bat wings. Her eyes are blue and she has eye lashes. Her stomach is light purple and her chest has a yellow heart. Her witch like hat head has a pattern of purple and then light purple stripes.
She was designed to have many supernatural abilities. These include the abilities of a ghost and being able to possess others in order to turn them into evil witches too. Once possessed, the victim is under Witch's complete control and also has her variety of abilities such as animation, spontaneous generation, levitation, demonic transformation, and other forms of reality-bending abilities.
Apparently, Witch can be forced out of her victim if she sees her reflection, much like how the evil creature Medusa was defeated in mythology.
- Witch's pod color is blue.
- Witch is described by the experiment computer screen as, "Experiment 610. Primary function: Utilizes supernatural force into abducting planetary leaders".