Yin Yang (Earth-32)/Dimension 1

Yin Yang is the Omnitrix's 1.5 DNA sample of a Naljian from Aegyptia in Ben 10: Omnitrix Unlimited.

Ben as Yin (Dark Side)
Yin resembles the Naljian seen in Busy Box, but with a few alterations. His energy flame body is black and constantly emanates smoke. His build is more masculine, with pointed fingers and short tendrils protruding from all over his body. He has white glowing eyes.

Ben as Yang (Light Side)
Yang resembles the Naljian seen in Busy Box, but with a few alterations. His energy flame body is bright white and constantly emanates light. His build is more masculine, with pointed fingers and solar flare protrusions all over his body. He has black glowing eyes.

Since Yin and Yang shar the same body, the left half has Yin's appearance, while the right one Yang's appearance.

Yin Yang wears the Omnitrix 1.5 symbol on his chest, however, instead of the green hourglass symbol, it displays a yin yang symbol.

Powers

 * Naljian Physiology: Being a Naljian, Yin Yang possesses all the powers, abilities and weaknesses of that species.
 * Telekinesis: Ying Yang possesses the ability to manipulate objects from a large distance for a variety of effects, such as attraction and repulsion.
 * Pure Fire Manipulation: Yang possesses the ability to create/generate, shape and manipulate pure fire in various shapes and forms.
 * Pure Fire Blast: Yang can unleash a powerful pure fire blast, that instantly purifies anything that comes into contact with it. The blast can cleanse poisons, venoms and even free a victim from Ectonurite possession. A side effect of the blast is that it makes the victim much more positive and optimistic than before, though this wears out eventually.
 * Dark Fire Manipulation: Yin possesses the ability to create/generate, shape and manipulate dark fire in various shapes and forms.
 * Dark Fire Blast: Yin can unleash a powerful dark fire blast, that instantly corrupts anything that comes into contact with it. The blast can cause severe mental anguish and even sickness. A side effect of the blast is that it makes the victim much more negative and pessimistic than before, though this wears out eventually.
 * Flight: Yin Yang has the ability to fly, by propulsing himself off of the ground.

Weaknesses

 * Average Strength: Yin Yang possesses strength equal to that of a human's in peak physical condition, so he be overpowered fairly easily.
 * Separation: Yin Yang can be forcibly split into two halves, this having severe consequences. The longer the two halves stay separated, they become more and more unstable, posing a threat to their allies.

Ben 10: Omnitrix Unlimited
Unknown

Trivia

 * Yin Yang is the third alien, after Heatblast and ChamAlien, that lacks green eyes.
 * Yin Yang is the first alien whose Omnitrix symbol lacks the green hourglass on it.