What's a good strategy to beat Cynthia with in Platinum?

I really need help. All her Pokemon are ten levels higher than mine. I plan on doing some more training, but here is my team as of right now:

RoseradeLevel 50Item: Big RootAbility: Poison Point-Toxic-Sludge Bomb-Giga Drain-Magical Leaf

GardevoirLevel 50Item: Mind PlateAbility: Trace-Future Sight-Psychic-Magical Leaf-Calm Mind

EmpoleonLevel 51Item: Mystic WaterAbility: Torrent-Brine-Surf-Shadow Claw-Waterfall

LuxrayLevel 50Item: Dread PlateAbility: Intimidate-Thunder Fang-Roar-Crunch-Strength

StaraptorLevel 50Item: Razor ClawAbility: Intimidate-Aerial Ace-Double Team-Close Combat-Fly

LucarioLevel 50Item: Fist PlateAbility: Inner Focus-Rock Smash-Dragon Pulse-Aura Sphere-Rock Climb

I also don’t mind replacing any member of my team for one of the Pokemon I can find on Victory Road (Rhydon, Gabite, Steelix, Floatzel, etc.)

Thank you in advance :)

Pleaselog inorregisterto add a comment.

I think your items and the Pokemon themselves are fine, but the movesets need a bit of upgrading. You don’t really need status moves in-game (unless the Pokemon lacks other moves) as just attacking is superior. Also, I don’t think you need shadow claw on Empoleon or future sight on Gardevoir. Normally, Pokemon are just fine with one STAB move of each of their types, unless it’s having both fly and aerial ace on a flyer. Overall, I would change your team to this if possible:

NOTE: This is designed to speed up the process of defeating the elite four as well as Cynthia herself.

Roserade@Big RootAbility: Poison PointGiga DrainSludge BombToxic SpikesHyper Beam

Gardevoir@Mind PlateAbility: TracePsychicShadow BallThunderboltMagical Leaf

Empoleon@Mystic WaterAbility: TorrentSurfIce BeamGrass KnotAnything else (maybe return?)

Luxray@Dread PlateAbility: IntimidateThunder FangCrunchIron TailStrength

Staraptor@Razor ClawAbility: IntimidateAerial AceFlyReturnClose Combat

Lucario@Fist PlateAbility: Inner FocusAura SphereFlash CannonRock SlideThunder Punch

I’d say (for the battle against Cynthia) start with Roserade and try to get some toxic spikes up, just be careful of Spiritomb’s psychic. Then do whatever you can with Roserade to defeat the Spiritomb, before switching to Staraptor for Roserade, Luxray for Togekiss, Empoleon for Garchomp (be very careful of earthquake), Gardevoir for Milotic and your Lucario against hers (again, be careful). The Elite Four should be fairly straightforward, butjust in case, I would use:

Staraptor, Lucario, Luxray and Empoleon for AaronRoserade, Gardevoir, Staraptor (risky with all those rock types), Lucario (only for her rock types and be very careful) and Empoleon for BerthaStaraptor, Luxray, Empoleon, Lucario (risky) and Gardevoir for FlintEveryone for Lucian

Hope I helped!