The 6th gym in Sapphire is Winona, who specialises in Flying type Pokemon, so you should use Electric types, as these are really effective against Flying type Pokemon
Thats right all though Winonas strongest will be hurt by ice a,dragon and rock,ice and rock are also super affective to flying types
Slugma is a Fire type Pokemon it is weak against: Ground, Rock and Water.
bug Pokemon arent very effective against water Pokemon therefore if you have water Pokemon then you can win easily against bug ones. I think this is right because in real life bugs die in water and one time I was on Pokemon sapphire and I went against a bug Pokemon with water and I won in one hit!
in the water maybe
bug, water, dark, ghost
in the water maybe
Yes, the water stone from Pokemon looks like Sapphire.
Staryu
The best water Pokemon in sapphire would probably be Kyogre. -Hope I helped...:D
under water
Wailord is an immense Water type Pokemon. It can be encountered in the wild in Pokemon Sapphire while Surfing on Route 129.
in water by fishing, surfing or diving, and in water institute.
Get a strong water pokemon. I used Azumarill.