Dark End is an experiment created by Delia using similar genetic blueprints to that of Stitch. It is because of this that Dark End does not have an official number. Delia made Dark End as a combatant in order to defeat Stitch in the Stitch! anime. Dark End is a female in the Japanese version and a male in the English dub.
Dark End is a very dark purple, rabbit-like experiment with purple claws, two gold earrings on their right ear, large ears similar to Delia, a small yellow Mohawk, white fur on their belly, hands, and around their eyes, and a pink rabbit-like nose.
Like Stitch, Dark End is able to mutate into a second form with four arms, two long antennae, and three spikes on their back. However, their eyes glow bright purple when doing so, and energy radiates off their body. They possesses Stitch's abilities of enhanced strength, invulnerability and fighting skills. They also possesses other abilities, such as creating faults in the ground, flight, teleportation, purple energy blasts and electricity.
Delia began the creation of Dark End at the start of the third season of the Stitch! anime and continued working on them until the second-to-last episode. After they were created, Delia then invaded Earth and sent out Dark End to defeat Stitch. Dark End easily had Stitch on the ropes, even with the help of some of the other experiments. However, Stitch eventually defeated Dark End using a hidden power he had. Afterwards, Jumba caught Dark End in a container, and the Grand Councilwoman arrested Delia, Hämsterviel, Gantu and Reuben. Dark End has not been seen since.