Swonic

Skuntank can be found in Ametrine Mountain, or one of the other mountains. You're going to need Surf and Waterfall, and it's at a high level of 68.

of the 6 pokemon, Croagunk and Nidorina are the only ones that can be 'found'. Skrelp is obtainable from the coral ward with a good rod. Zubats/Golbats are found in the railnet where the track puzzle is. Haunter is dead, don't ask, he was axed with a spectral axe 5000 years ago (damn you ame ;-, and trubbish and grimer can be found in any sewer/alleyway you can think of.

or whichever one of trubbish/grimer was on his team - I forget.