Renamed as Blizzard Clone, it no longer guards Primevil's chamber, instead being relocated to B28F, guarding a chest on a secret area. In order to reach it, you need to fall on a hole on B27F, on the coordinates D-6. The Blizzard Clone is much weaker than the Blizzard King, and lacks a few dangerous moves like Mirror Shield or Wail. The lack of Wail will also mean that it is much more difficult to predict the turns it will use Ice Torrent, barring the first.
The fact that all of the dragon clones drop a volt core may hint toward them in fact being machines, created based on the dragons, that work using said item as an energy source. This, however, is unconfirmed, as they are, in-game, called clones. Also, the item description says it is an embryo.