How do you beat the elite four in saphire?

Ruby Version Strategy Guide Ryan PralleGyms Gym Leader Gym Type Suggested Type(s) Suggested Level TM HM UsageRoxanne Rock Water/Grass 15 Rock Tomb Cut Brawly Fighting Flying/Psychic 20 Bulk Up Flash Wattson Electric Ground 25 Shockwave Rock Smash Flannery Fire Water/Ground/Rock 30 Overheat Strength Norman Normal Fighting 35 Façade Surf Winona Flying Ice/Electric/Rock 35 Areial Ace Fly Liza & Tate Psychic Bug/Ghost/Dark 40 Calm Mind Dive Wallace Water Grass/Electric 45 Water Pulse Waterfall Final Four/Champion LeaderPokemon Type Suggested Type(s) LevelSidney Mighthyena Dark Fighting/Bug 46 Shiftry Grass/Dark Fire/Ice/Flying 48 Cacturne Grass/Dark Fire/Ice/Flying 46 Sharpedo Water/Dark Grass/Electric 48 Absol Dark Fighting/Bug 49 Phoebe Dusclops Ghost Ghost/Dark 48 Banette Ghost Ghost/Dark 49 Sableye Ghost/Dark None 50 Banette Ghost Ghost/Dark 49 Dusclops Ghost Ghost/Dark 51 Glacia Glalie Ice Fire/Fighting/Rock 50 Sealeo Water/Ice Fighting/Rock 50 Sealeo Water/Ice Fighting/Rock 52 Glalie Ice Fire/Fighting/Rock 52 Walrein Water/Ice Fighting/Rock 53 Drake Shelgon Dragon Ice/Dragon 52 Altaria Dragon/Flying Ice/Rock 54 Flygon Dragon/Ground Ice 53 Flygon Dragon/Ground Ice 53 Salamence Dragon/Flying Ice/Rock 55 Steven Skarmory Steel/Flying Electric/Fire 57 Aggron Rock/Steel Ground/Fighting 56 Claydol Psychic/Ground Water/Grass/Ice 55 Cradily Rock/Grass Ice/Fighting/Steel 56 Armaldo Rock/Bug Water/Rock/Steel 56 Metagross Psychic/Steel Fire/Ground 58 Suggested PokemonName Type Absol Dark Magnetric Electrick Hariyama Fighting Camerupt Ground Glalie Ice Wailord Water