Diamondhead's appearance mixes his Heroes United design with that of Ben 10,000's Diamondhead in the original series. He has his HU look, with an outfit similar to that of adult Diamondhead. His crystals are now much more blue in color. He wears the Omnitrix on his chest.
Diamondhead retains almost all of his powers from the original canon. He no longer has the ability to absorb and redirect energy, just refract it.
Diamondhead retains all of his weaknesses from the original series.
- Diamondhead first reappeared in The More They Stay the Same to protect himself from a time attack by MaltrEon.
- Diamondhead unintentionally appeared to fight Eon in Lie as Old as Time.
- The More They Stay the Same (first reappearance)
- Lie as Old as Time (unintentional transformation)
- The original Diamondhead art was made by TheHawkDown on DeviantArt.