u/Ok_Significance3424

I want to make another “variation” of gastly (like a shiny) that is white and has red smoke, like the image above. I’ve managed to change gastly itself to white but i can’t get the smoke to be red without it changing all of the gastlys smoke to red. Would anyone be able to help me with this?

EDIT: I figured it out now, thank you to everyone who responded though!