His attack is "Dark Rider Kick".
Translation:
"Dark Kabuto- the transformed state of a man who uses the Dark Kabuto Zecter, and looks just like Tendou Souji. He is the strongest warrior, born to destroy Kabuto."
The last pic says that "Mimic Tendou Souji" is a "Worm copying Tendou's form and heart" (his feelings for Hiyori.) So I am guessing he probably will think he's the real deal or something.
There is also an item known as the Dark Kabuto Hyper Zecter"