Decathalon is a humanoid transformation that very closely resembles a human. He has a muscular body with light, Caucasian colored skin. He has a white beard and mustache, along with green pupils with large white eyebrows. He wears a green, black, white, and silver uniform reminiscent of ancient Greek clothing.
The Omnitrix symbol is located on his waist.
- Enhanced Speed- Decathalon is capable of running at high speeds.
- Enhanced Strength- Decathalon has enough strength to break stone.
- Enhanced Durability- Decathalon is capable of withstanding deadly blows without injury due to his skin, muscles, and bones tissue are about three times denser than similar human tissue, contributing to his superhuman strength and weight.
- Electrical Generation- His body produces static electricity whenever he reaches his top speed.
- Superhuman Stamina - Decathalons highly advanced musculature produces no fatigue toxins, enabling him to sustain almost indefinitely.
- Regenerative Healing Factor -Despite Decathalon's great resilience, it is possible to injure him, yet he is capable of recovering from injuries with superhuman speed and efficiency. However, he is unable to regenerate missing limbs or organs unless he used assistance to do so. He is also immune to all known Earthly diseases and infections. He is highly resistant to most drugs and toxins but can be affected if exposed to great quantities.
- Superhuman Reflexes -Decathalon's reflexes are in levels beyond the natural physical limits of the finest human athlete.
- Superhuman Agility - Despite his extreme muscular size, Decathalon has the ability to move his body with flexibility and coordination that are significantly beyond the natural limits of the human body.
- Decathalon is based on Greek Gods.