I main Luigi and have trouble against a campy Pikachu. I have trouble approaching. I can't double aerial opponents who know what they are doing with the blasted rat. Usually they shield jump uair which comes out faster than the nair or any other aerials. I found my best approach was using wd backwards bairs so I can space away from any counterattack. When I do this the rat camps neutral B's. I get gimped alot by his upsmash or downsmash into down B. whats the best way to avoid this?