It is also Ghost Type
http://www.serebii.net/blackwhite/elitefour.shtml
so you can't get passed shauntal? are you talking about Cofagrigus? If yes then it is vulnerable to ghost and Dark attacks and resistant to poison and bug. Is unaffected by normal and fighting. It has great physical defense so hit it with special attacks (it has good special defense but not as high as physical). It has low speed so you should go first when you fight, try putting a condition on it (sleep, paralyze or something)