Deadlemur is a three-eyed Lemur/Tarsier sniper-type Mirror Monster and an antagonist in Kamen Rider Ryuki.
Kamen Rider Ryuki
It roamed around the elevators of Le Crock, starting the Non-Stop Elevator urban legend. It is later destroyed by Knight's Hishou Zan and absorbed by Dragredder.
Deadlemur later appeared in Shinji's dream during the Hyper Video special as among those destroyed in Zolda's End of World.
OOO, Den-O, All Riders: Let's Go Kamen Riders
In the alternate timeline where Shocker ruled the world in 2011 and folded all future villain groups into it, Deadlemur was one of the monsters that served the evil organization.
Kamen Rider Wizard
Deadlemur appeared as one of the monsters that lived in the World within the Magic Stone. It assisted Amadum in an attempt to claim a chest full of Kamen Rider Rings. It was later destroyed by Kamen Rider Kiva with his Darkness Moon Break.