General Information
Species Crystalsapien
Home World Petropia
Body Crystalline Humanoid
Powers and Abilities
Voice Actor Dee Bradley Baker
First Appearance Mad's Test

Polarstone is Yellow's Omnitrix's DNA sample of a Crystalsapien from the planet Petropia in Yellow.


Polarstone has the same body and shape of any Crystalsapien, however his hands, face and crystals are blue, his stone-like body is grey, and his eye is yellow. He has Chromastone's Ultimate Alien and Alien Force appearance.

Transformation Sequence

The blackground is yellow, and Yellow spins around from his front to his back, where two blue crystals form on his back. We're then shown to Yellow's wrist, watchless as it turns from flesh and skin to gray stone. His hands turn the same blue color as his back crystals are. Then we're shown Yellow's face, which also turnes stone with the blue crystal in the center. His eyes also form together to make one eye. There also is one crystal that grows ontop of his head. Finally, we're seen a full body view of this new alien with 2 more crystals growing from his upper chest and the Omnitrix in the middle.

Powers and Abilities

Polatstone has the same abilities as any Crystalsapien: Ultraviolet energy, energy absorption, flight, enhanced strength, ect. But Polarstone has one ability that other Crystalsapiens do not: Cryokinesis.


Polarstone is very weak to fire and is not immune to energy. In Yellow's dimension, if Crystalsapien's attacks are reflected or redirected back to them, they can be shattered.


Before his debut, he was apparently locked in the Omnitrix and was soon revealed as Yellow's tenth alien. In his first appearance, his power was tested against Mad Ben's NRG. After trying to figure out how to use him, he defeats Mad NRG with ease.



  • Polarstone was originally going to be named "Prismblast".
  • The name "Polarstone" was said by Aaron when it was first seen to the public. The name was cool and had a nice ring to it, so it stuck.
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