You cant, you need to evolve a Stunky.
Skuntank is not found in Platinum. It is exclusive to Diamond. (Same applies with Stunky). The only way is to trade a Skuntank or Stunky from Diamond.
You can't get a skuntank in Pokemon Pearl version. You must trade it from Pokemon diamond or platinum. Instead of being able to catch a stunky you are able to catch glameow and purugly. Hope this helped
Skuntank
trade from Pokemon diamond. it is only found in Pokemon diamond
routes 221 & 225
Stunky will evolve into skuntank at lv 34.
Well if I had time I would list them all out but I don't. So the special Pokemon you can ONLY get in diamond (not in pearl or platinum) are: Murkrow Honchkrow Stunky Skuntank
Stunky evolves into Skuntank at level thirty-four :-Dit evolves at level 34 and it evolves to Skuntank. it you Pokemon lovers out there need a hand on Pokemon evolution just ask me!!- superryan49
No, in Pearl you can't get Skunky, Skuntank or Dialga and in Diamond you can't get Palkia or Sudowoodo
You cannot catch Celebi in Pokemon Diamond.
yes, you can catch Pokemon in Pokemon diamond
The Darkrai event allows access to Fullmoon Island to catch him in a dream. but if you missed that (like ME) you can catch a Stunky under the Cycling Road. And Train it up to be a Skuntank like the Galactic Commander Jupiter.