Poltergeist pic
I don't know if yours is the same thing, but I had contacted a breeder (Brian Ditch) who was selling poltergeist and rusty corns. This is the response and pics I he sent me:
"poltergeist is a integrade using grey rat.. and the rusty is a integrade using black rat.. they can be quite variable in appearance some look like lavenders some look like ghosts and some look like a mix of lav/ghost".
The first pic is the poltergeist.