Unfortunately I do not have the Spheal (it was actually a part of my team and is now a Walrein)
I do, however, have two Dunsparce. One is on my original Colo. file from 6 years ago (nicknamed Sparce, has a serious nature). The other one is from a more recent playthrough and still needs to be purified. Which one do you want?
Mm, I've went through a change of mind in the past few minutes. C; I can do it for the Articuno. Sorry for being so indecisive, haha.
EDIT: @Crayonz: At 40, the odds are 1/200. That is the highest you can get so there is no point in chaining further after that. At 30, the odds are like 1/1000, so it's not directly proportional at all. Your best bet is to get to 40.