Once you go into the Elite Four's building, you can't get back out again until you have defeated them or you have been defeated. There are no nurses, and no way to switch pok on using a PC. Be sure not to go inside until you are absolutely ready.
You are allowed to fight the Elite Four in any order that you choose. Once you defeat one of them, you can take your time to heal up your party before proceeding to the next member of the Elite Four. You can save after defeating an Elite Four member, but keep in mind that if you realize that you can't possibly defeat one of the Elite Four with your current party, then if you have saved the game inside of the Elite Four's building, you will have to allow one of them to defeat you in order to get back out.
Shauntal
Shauntal specializes in Ghost pokémon.
L48 Cofagrigus ♀
- Type: Ghost
- Weak to: Ghost, Dark
- Move set:
- Psychic (Psychic Special - Power 90 - Accuracy 100%)
- Will-O-Wisp (Fire Status)
- Shadow Ball (Ghost Special - Power 80 - Accuracy 100%)
- Grass Knot (Grass Special - Power greater against heavier pokémon - Accuracy 100%)
- Base Stats:
- HP: 58
- Attack: 50
- Defense: 145
- Sp.Atk: 95
- Sp.Def: 105
- Speed: 30
Cofagrigus is a bit more vulnerable to Special attacks than to Physical attacks. It only uses Special attacks. A good opponent will be one that is resistant to Ghost moves since Cofagrigus gets the same type attack bonus for its Ghost move. This means that you should bring a Dark, Steel, or Normal pokémon. A Normal pokémon is immune to Cofagrigus's Ghost move. You might consider bringing Stoutland to this fight. Its Crunch move is super-effective against Cofagrigus, and it is immune to Cofagrigus's Ghost move.
L48 Jellicent ♀
- Type: Water/Ghost
- Weak to: Ghost, Grass, Electric, Dark
- Move set:
- Shadow Ball (Ghost Special - Power 80 - Accuracy 100%)
- Surf (Water Special - Power 95 - Accuracy 100%)
- Energy Ball (Grass Special - Power 80 - Accuracy 100% - has a 10% chance of lowering target's Special Defense)
- Brine (Water Special - Power 65 (doubles to 130 when used on a target whose HP is at or below 50%) - Accuracy 100%)
- Base stats:
- HP: 100
- Attack: 60
- Defense: 70
- Sp.Atk: 85
- Sp.Def: 105
- Speed: 60
Bouffalant might be a good opponent if you teach it Wild Charge from TM93, which you can get in Victory Road. Stoutland with Crunch might also work.
L48 Golurk
- Type: Ground/Ghost
- Weak to: Ghost, Water, Grass, Ice, Dark
- Move set:
- Curse (Ghost Status - User loses half of maximum HP, and the target gets a curse that reduces its HP by 1/4 of its max at the end of each turn)
- Brick Break (Fighting Physical - Power 75 - Accuracy 100% - Removes Light Screen and Reflect from target unless target is a Ghost type)
- Earthquake (Ground Physical - Power 100 (200 if the target is underground) - Accuracy 100%)
- Shadow Punch (Ghost Physical - Power 60 - Never misses)
- Base stats:
- HP: 89
- Attack: 124
- Defense: 80
- Sp.Atk: 55
- Sp.Def: 80
- Speed: 55
Crustle with Shadow Claw might be a good choice here.
L50 Chandelure ♀
- Type: Ghost/Fire
- Weak to: Ground, Rock, Ghost, Water, Dark
- Move set:
- Fire Blast (Fire Special - Power 120 - Accuracy 85% - has a 10% chance of burning the target)
- Psychic (Psychic Special - Power 90 - Accuracy 100% - has a 10% chance of lowering target's Special Defense)
- Shadow Ball (Ghost Special - Power 80 - Accuracy 100% - has a 20% chance of lowering target's Special Defense)
- Payback (Dark Physical - Power 50 (100 if user attacks after target) - Accuracy 100%)
- Base stats:
- HP: 60
- Attack: 55
- Defense: 90
- Sp.Atk: 145
- Sp.Def: 90
- Speed: 80
Scrafty with Crunch could work well here. Also, Darmanitan is a possibility, if you teach it Earthquake, Bulldoze, or Rock Slide.
Grimsley
Grimsley specializes in Dark pokémon.
L48 Scrafty ♂
- Type: Dark/Fighting
- Weak to: Fighting, Flying
- Move set:
- Sand-Attack (Ground Status - Accuracy 100% - Decreases target's accuracy by one stage)
- Crunch (Dark Physical - Power 80 - Accuracy 100% - has a 20% chance of lowering target's Defense)
- Poison Jab (Poison Physical - Power 80 - Accuracy 100% - has a 30% chance of poisoning the target)
- Brick Break (Fighting Physical - Power 75 - Accuracy 100% - Removes Light Screen and Reflect from target unless target is a Ghost type)
- Base stats:
- HP: 65
- Attack: 90
- Defense: 115
- Sp.Atk: 45
- Sp.Def: 115
- Speed: 58
Crustle with Aerial Ace could work well here.
L48 Krookodile ♀
- Type: Ground/Dark
- Weak to: Fighting, Bug, Water, Grass, Ice
- Move set:
- Crunch (Dark Physical - Power 80 - Accuracy 100% - has a 20% chance of lowering target's Defense)
- Dragon Claw (Dragon Physical - Power 80 - Accuracy 100%)
- Foul Play (Dark Physical - Power 95 - Accuracy 100% - Inflicts damage based on the target's Attack stat rather than the user's)
- Earthquake (Ground Physical - Power 100 (200 if the target is underground) - Accuracy 100%)
- Base stats:
- HP: 95
- Attack: 117
- Defense: 70
- Sp.Atk: 65
- Sp.Def: 70
- Speed: 92
Ferrothorn with Power Whip would work well. Crustle with X-Scissor could also be a good choice.
L48 Liepard ♀
- Type: Dark
- Weak to: Fighting, Bug
- Move set:
- Fake out (Normal Physical - Power 40 - Accuracy 100% - Only works on first turn, has priority +3 and always makes the target flinch unless it has the ability Inner Focus or Shield Dust)
- Night Slash (Dark Physical - Power 70 - Accuracy 100% - Has a higher critical hit ratio)
- Attract (Normal Status - Accuracy 100% - Causes target to become infatuated if it is the opposite gender of the user)
- Aerial Ace (Flying Physical - Power 60 - Is unaffected by modifications to Accuracy adn Evasion stats)
- Base stats:
- HP: 64
- Attack: 88
- Defense: 50
- Sp.Atk: 88
- Sp.Def: 50
- Speed: 106
Ferrothorn with X-Scissor would work well here, as could Cobalion with Sacred Sword or Crustle with X-Scissor.
L50 Bisharp ♀
- Type: Dark/Steel
- Weak to: Fighting (super-weak), Ground, Fire
- Move set:
- X-Scissor (Bug Physical - Power 80 - Accuracy 100%)
- Night Slash (Dark Physical - Power 70 - Accuracy 100% - Has a higher critical hit ratio)
- Metal Claw (Steel Physical - Power 50 - Accuracy 95% - has 10% chance of raising user's attack by one level)
- Aerial Ace (Flying Physical - Power 60 - Is unaffected by modifications to Accuracy adn Evasion stats)
- Base stats:
- HP: 65
- Attack: 125
- Defense: 100
- Sp.Atk: 60
- Sp.Def: 70
- Speed: 70
Since Bisharp is super-weak to Fighting, a good choice here is Cobalion with Sacred Sword. Another option is Darmanitan with Hammer Arm or Superpower.
Caitlin
Caitlin specializes in Psychic pokémon.
L48 Reuniclus ♀
- Type: Psychic
- Weak to: Bug, Ghost, Dark
- Move set:
- Energy Ball (Grass Special - Power 80 - Accuracy 100% - has a 10% chance of lowering target's Special Defense)
- Thunder (Electric Special - Power 120 - Accuracy 70% - has a 30% chance of paralyzing target)
- Focus Blast (Fighting Special - Power 120 - Accuracy 100% - has a 10% chance of lowering target's Special Defense)
- Psychic (Psychic Special - Power 90 - Accuracy 100%)
- Base stats:
- HP: 110
- Attack: 65
- Defense: 75
- Sp.Atk: 125
- Sp.Def: 85
- Speed: 30
Gothitelle might be a good choice, although its Dark moves are not very strong. Instead you could try using Cofagrigus with Shadow Ball or Beheeyem with Shadow Ball. Crustle with Shadow Claw is also an option.
L48 Sigilyph ♀
- Type: Psychic/Flying
- Weak to: Rock, Ghost, Electric, Ice, Dark
- Move set:
- Air Slash (Flying Special - Power 75 - Accuracy 95% - has a 30% chance of causing target to flinch)
- Shadow Ball (Ghost Special - Power 80 - Accuracy 100%)
- Ice Beam (Ice Special - Power 95 - Accuracy 100% - has a 10% chance of freezing the target)
- Psychic (Psychic Special - Power 90 - Accuracy 100%)
- Base stats:
- HP: 72
- Attack: 58
- Defense: 80
- Sp.Atk: 103
- Sp.Def: 80
- Speed: 97
Ferrothorn with Shadow Claw, Darmanitan with Rock Slide, or Bouffalant with Wild Charge might work well here.
L48 Musharna ♀
- Type: Psychic
- Weak to: Bug, Ghost, Dark
- Move set:
- Shadow Ball (Ghost Special - Power 80 - Accuracy 100%)
- Psychic (Psychic Special - Power 90 - Accuracy 100%)
- Charge Beam (Electric Special - Power 50 - Accuracy 90% - has a 70% chance of raising the user's Special Attack)
- Reflect (Psychic Status - Reduces physical damage done to anyone on the user's party by 50% for five turns)
- Base stats:
- HP: 116
- Attack: 55
- Defense: 85
- Sp.Atk: 107
- Sp.Def: 95
- Speed: 29
Try Ferrothorn with Shadow Claw, Scrafty with Crunch, Bouffalant with Megahorn, or Stoutland with Crunch.
L50 Gothitelle ♀
- Type: Psychic
- Weak to: Bug, Ghost, Dark
- Move set:
- Calm Mind (Psychic Status - Raises user's Special Attack and Special Defense)
- Thunderbolt (Electric Special - Power 95 - Accuracy 100% - has a 10% chance of paralyzing the target)
- Psychic (Psychic Special - Power 90 - Accuracy 100%)
- Shadow Ball (Ghost Special - Power 80 - Accuracy 100%)
- Base stats:
- HP: 70
- Attack: 55
- Defense: 95
- Sp.Atk: 95
- Sp.Def: 110
- Speed: 65
Try using Ferrothorn with Shadow Claw, Scrafty with Crunch, Bouffalant with Megahorn, or Stoutland with Crunch.
Marshal
Marshal specializes in Fighting pokémon.
L48 Throh ♂
- Type: Fighting
- Weak to: Flying, Psychic
- Move set:
- Stone Edge (Rock Physical - Power 100 - Accuracy 80% - has a higher critical hit ratio)
- Payback (Dark Physical - Power 50 (100 if user attacks after target) - Accuracy 100%)
- Bulldoze (Ground Physical - Power 60 - Accuracy 100% - lowers target's Speed)
- Storm Throw (Fighting Physical - Power 40 - Accuracy 100% - always a critical hit unless user has Battle Armor, Shell Armor, or is affected by Lucky Chant)
- Base stats:
- HP: 120
- Attack: 100
- Defense: 85
- Sp.Atk: 30
- Sp.Def: 85
- Speed: 45
Durant with Aerial Ace or Haxorus with Aerial Ace might be a good option here.
L48 Sawk ♂
- Type: Fighting
- Weak to: Flying, Psychic
- Move set:
- Stone Edge (Rock Physical - Power 100 - Accuracy 80% - has a higher critical hit ratio)
- Karate Chop (Fighting Physical - Power 50 - Accuracy 100% - has a higher critical hit ratio)
- Grass Knot (Grass Special - Power greater against heavier pokémon - Accuracy 100%)
- Retaliate (Normal Physical - Power 70 (140 if a pokémon from the user's party fainted in the same turn) - Accuracy 100%)
- Base stats:
- HP: 75
- Attack: 125
- Defense: 75
- Sp.Atk: 30
- Sp.Def: 75
- Speed: 85
Durant with Aerial Ace, Gothitelle with Psychic or Haxorus with Aerial Ace might work well here.
L48 Conkeldurr ♂
- Type: Fighting
- Weak to: Flying, Psychic
- Move set:
- Stone Edge (Rock Physical - Power 100 - Accuracy 80% - has a higher critical hit ratio)
- Hammer Arm (Fighting Physical - Power 100 - Accuracy 90% - lowers user's Speed)
- Retaliate (Normal Physical - Power 70 (140 if a pokémon from the user's party fainted in the same turn)
- Grass Knot (Grass Special - Power greater against heavier pokémon - Accuracy 100%)
- Base stats:
- HP: 105
- Attack: 140
- Defense: 95
- Sp.Atk: 55
- Sp.Def: 65
- Speed: 45
Durant with Aerial Ace, Gothitelle with Psychic or Haxorus with Aerial Ace might work well here.
L50 Mienshao ♂
- Type: Fighting
- Weak to: Flying, Psychic
- Move set:
- U-turn (Bug Physical - Power 70 - Accuracy 100% - Switches the user out after doing damage, unless there are no other pokémon in the party)
- Jump Kick (Fighting Physical - Power 100 - Accuracy 95% - inflicts recoil damage on user equal to half the user's maximum HP, rounded down)
- Rock Slide (Rock Physical - Power 75 - Accuracy 90% - has a 30% chance of causing the user to flinch)
- Retaliate (Normal Physical - Power 70 (140 if a pokémon from the user's party fainted in the same turn)
- Base stats:
- HP: 65
- Attack: 125
- Defense: 60
- Sp.Atk: 95
- Sp.Def: 60
- Speed: 105
Durant with Aerial Ace or Haxorus with Aerial Ace might work well here.