I got passed Shelly (after like a month of trying) and the doctors, but now I just need to face Shade, I took down Gengar (after it got rid of 4 pokemon I had) and lost to Rotom, which pokemon would be best to beat him?
Primarily Dark and Gjost types help a lot against him last I played (granted this was quite a while ago). Something of either of those types with either good bulk or speed tends to work best. Sorry if this isn't the best advice