Sheerghosts are a dragonfly-themed type of Mirror Monsters and antagonists in Kamen Rider Ryuki.
They are capable of evolving into stronger Mirror Monsters called Raydragoons and even further into larger Mirror Monsters called Hydragoons.
Kamen Rider Decade: All Riders Vs. Dai-Shocker
Several Sheerghosts were among the massive Dai-Shocker army in the World of Decade. The Dai-Shocker army fought against a gathering of 25 Kamen Riders.
Kamen Rider Wizard
Two Sheerghosts were among the group of monsters that attacked a boy and girl in the World within the Magic Stone. The monsters were all defeated when Kamen Rider Gaim appeared and destroyed all of them.