How are you supposed to catch Croagunk?(Pokemon)?

Question

Ok, I know where to catch Croagunk and I just want to catch him because I need black sludge. But, how in the world am I supposed to catch him if he runs away and soon as I find him. Throwing bait he runs away, throwing mud he runs away, and finally when I throw a pokeball he runs away. How in heck do I catch this guy. It's times like these when I think I am going to go buy that AR hack thing. Actually I think I will go buy the AR and start hacking items. I've played this game for almost 400 hours legitley. But I'm just not going to waste my time trying to get an item that croagunk has and to top that it only has it at a %5 chance.

Answer 1

You go to Pastoria City Marsh (Safari Zone,) and go up stairs and look through the binoculars. If you see a Croagunk in a particular part of the Great Marsh, go to it and you will find a Croagunk.

Answer 2

ok well he was hard but look for a croagunk at lv 20 - 25 then it will be easer to catch.