I need advice from anyone who has successfully used the PokeRadar to catch Slowpoke. I heard that the location was the West part of Route 211. I've made several attempts into that area all week, and while I have found several Tyrogue, I have yet to even see a Slowpoke (yes, I am using Pearl).

I know PokeRadar pokemon are rare, but come on! It never takes me this long to find one! What am I doing wrong?