The Sungazer Fangire is a Reptile Class Fangire and an antagonist in Kamen Rider Kiva.
Kamen Rider Kiva
The Sungazer Fangire attacked Mamoru Shima while he was visiting Yuri Aso's gravestone, leaving him with severe injuries. While Shima was being healed by Dr. Kanda, Taiga Nobori used the machine to infuse Shima with the Sungazer Fangire's essence. This causes Shima to develop new Fangire powers but also unable to control himself. Shima was later seemingly killed by Saga, but was actually spirited away to receive medical attention and had the Fangire essence removed.
Kamen Rider Decade: All Riders vs. Dai-Shocker
The Sungazer Fangire was part of the Dai-Shocker army in the World of Decade. He was among the many monsters who took part in the battle against the gathering of 25 Kamen Riders.
Kamen Rider × Kamen Rider W & Decade: Movie War 2010
The Sungazer Fangire was revived as part of the Dai-Shocker remnant, Super Shocker. He took part in the final battle. After Doras appeared Sungazer Fangire and the other monsters sided with it. He was later destroyed by a surprise Rider Kick from Kamen Rider Agito.