The Elasmotherium Orphnoch is one of the villains who only appeared in Kamen Rider 555: Paradise Lost.
It is an enormous Orphnoch, appearing only in a beast-like Violent Emotion with no apparent human form. It killed Yuka, ate Kaido, smashed the Auto Vajin, and nearly ate Mari before Kiba, as Orga, distracted it enough to be destroyed by Faiz Blaster Form's Photon Buster.
All Kamen Rider: Rider Generation 2
The Elasmotherium Orphnoch appears as a monster in the video game All Kamen Rider: Rider Generation 2.