Fatal fatigue is risked when using more than one full combo (as first seen in episode 15). In addition, full Combos (that is, three from the same set) are incredibly taxing on Eiji's body, as they embody the full power of the corresponding Greeed.

If it takes further damage, the power will cut off completely and the section's corresponding Medal will be forcefully ejected from the OOO Driver, canceling the transformation. In a fight, if a particular section of OOO receives a significant amount of damage, the power of that section will be disrupted. From left to right: Latorartar, Putotyra, Sagohzo, Tatoba, Gatakiriba, Burakawani, Shauta, and TajadolĮach aspect of a combination of Core Medals gives OOO different powers and weaknesses. Like Kamen Rider Double before him, OOO has multiple combinations of forms he can access referred to as Combos ( コンボ, Konbo).

After Eiji inserts three Core Medals into the OOO Driver, he scans them with the O Scanner, and then holds the O-Scanner up to his chest, he transforms into Kamen Rider OOO.

Kamen rider ooo flash belt