Ruby & Sapphire: Elite Four Guide Legend:
@ ? = Item that Pokemon is holding
Lv ? = Pokemon's Level
~? = Characteristic
-? = Attack

Sidney
 1. Mightyena
Lv 46 Male @ None
~Intimidate
-Sand Attack
-Take Down
-Roar
-Crunch		 2. Shiftry
Lv 48 Male @ None
~Chlorophyll
-Fake Out
-Extra Sensory
-Double Team
-Swagger
3. Cacturne
Lv 46 Male @ None
~Sand Veil
-Cotton Spore
-Faint Attack
-Leech Seed
-Needle Arm		 4. Sharpedo
Lv 48 Male @ None
~Rough Skin
-Surf
-Swagger
-Slash
-Crunch		 5. Absol
Lv 49 Male @ Sitrus Berry
~Pressure
-Snatch
-Slash
-Swords Dance
-Aerial Ace

Use a Fighting attack to defeat Sidney. If you use a fighting Pokemon for him, watch out for Shiftry's Extrasensory and Absol's Aerial Ace. Fire back-up could take out Shiftry.



Phoebe
 1. Dusclops
Lv 48 Female @ None
~Pressure
-Confuse Ray
-Curse
-Future Sight
-Shadow Punch		 2. Banette
Lv 49 Female @ None
~Insomnia
-Faint Attack
-Spite
-Will-o-Wisp
-Shadow Ball
3. Sableye
Lv 50 Female @ None
~Keen Eye
-Shadow Ball
-Attract
-Psychic
-Faint Attack		 4. Banette
Lv 49 Female @ None
~Insomnia
-Shadow Ball
-Psychic
-Toxic
-Skill Swap		 5. Dusclops
Lv 51 Female @ Sitrus Berry
~Pressure
-Earthquake
-Ice Beam
-Shadow Ball
-Confuse Ray

Since all of Phoebe's Pokemon are Ghost, with the exeption of Sableye (Dark/ghost). Use a Dark move to get through Phoebe. I would suggest Bite or Crunch.



Glacia
 1. Glalie
Lv 50 Female @ None
~Inner Focus
-Ice Beam
-Hail
-Crunch
-Light Screen		 2. Sealeo
Lv 50 Female @ None
~Thick Fat
-Surf
-Ice Ball
-Body Slam
-Hail
3. Sealeo
Lv 52 Female @ None
~Thick Fat
-Blizzard
-Attract
-Hail
-Dive		 4. Glalie
Lv 52 Female @ None
~Inner Focus
-Ice Beam
-Shadow Ball
-Crunch
-Hail		 5. Walrein
Lv 53 Female @ Sitrus Berry
~Thick Fat
-Blizzard
-Surf
-Sheer Cold
-Body Slam

Fire will take down Glacia, except for the two Sealeos and Walrein (Ice and Water). Fighting also does well against Ice, so you may want to use Fighting against the three Ice/Water Pokemon.



Drake
 1. Shelgon
Lv 52 Male @ None
~Rock Head
-Rock Tomb
-Dragon Claw
-Crunch
-Protect		 2. Altaria
Lv 54 Male @ None
~Natural Cure
-Dragon Dance
-Take Down
-Dragonbreath
-Refresh
3. Flygon
Lv 53 Male @ None
~Levitate
-Dragonbreath
-Dig
-Sandstorm
-Fly		 4. Flygon
Lv 53 Male @ None
~Levitate
-Flamethrower
-Dragonbreath
-Sand-Attack
-Crunch		 5. Salamence
Lv 55 Female @ Sitrus Berry
~Intimidate
-Dragon Claw
-Crunch
-Flamethrower
-Fly

All of Drake's Pokemon are at least part Dragon. Ice does best against Dragon compared to all other types. You could use other dragon Pokemon, but since Dragons are weak against Dragons, you will be at an advantage too.



Champion Steven
 1. Skarmory
Lv 57 Male @ None
~Keen Eye
-Aerial Ace
-Toxic
-Steel Wing
-Spikes		 2. Claydol
Lv 55 (No Gender) @ None
~Levitate
-Reflect
-Light Screen
-Ancient Power
-Earthquake
3. Aggron
Lv 56 Male @ None
~Sturdy
-Earthquake
-Thunder
-Dragon Claw
-Solar Beam		 4. Cradily
Lv 56 Male @ None
~Suction Cups
-Sludge Bomb
-Giga Drain
-Ancient Power
-Confuse Ray		 5. Armaldo
Lv 56 Male @ None
~Battle Armor
-Ancient Power
-Aerial Ace
-Slash
-Water Pulse
6. Metagross
Lv 56 (No Gender) @ Sitrus Berry
~Clear Body
-Psychic
-Meteor Smash
-Hyper Beam
-Earthquake

Steven has many different types of Pokemon, not just Dark, not just Dragon, etc. Any of the Pokemon that I previously suggested, should be good here. Fire, Water, Fighting