As revealed after defeating Lucian, a member of the Elite Four, those of the Pokémon League of Pokémon Brilliant Diamond and Brilliant Pearl will have to end up facing the current champion. With the result that she is none other than the already useful Cynthia, it will be clear halfway through the battle that she will be anything but a guiding hand here. With six wildly different Pokémon in her group, this fight is sure to be your most challenging.
Which Pokémon does Cynthia use?
The full group of Pokémon you'll see from Cynthia are Spiritomb (Lv. 61), Roserade (Lv. 60), Gastrodon (Lv. 60), Lucario (Lv. 63), Milotic (Lv. 63), and Garchomp (Lv. 66) ) - probably used in that order. As expected, Cynthia will have at least two Full Reset, typically both used on Garchomp. Speaking of healing, Milotic may be the biggest challenge of the group, as her recovery move will be used multiple times to regenerate half of her maximum HP. As for the rest of the notable threats, expect Garchomp to repeatedly attack with Earthquake, with Gastrodon mostly using his Scald attack until he runs out.
As this is only a climatic and difficult battle, it is recommended that players only have Pokémon of level 60 or higher. If they don't exceed this threshold, chances are you'll need at least 30 potions and revives just to maintain a victory shot against Cynthia.
The best Pokemon to use against Cynthia in the Pokémon League
If you've found yourself constantly losing to her over and over again, your best strategy will have to be to switch sides of your team to revolve around Cynthia's Pokemon weaknesses. This could mean that the Elite Four will get a little tougher, but it will definitely be worth it in the long run.
The best Pokémon ever to use against Cynthia, and it's incredibly easy to catch, is abomasnow - found on the snow-capped peaks of Mount Coronet. This Ice-type is able to withstand Garchomp's violent Earthquake multiple times, countering it with extremely effective attacks such as Ice Punch and Blizzard.
Furthermore, Abomasnow is also a great solution against Milotic and Gastrodon, but it should be used very differently against it. For example, ask Abomasnow to learn and use Grass-type moves like Wood Hammer. The move, which has 120 Power, deals double its base damage to Milotic and four times its base damage to Gastrodon. Defensively, the Pokémon is also one of the few able to overcome Milotic's Ice Beam attack.
To battle Lucario and Roserade, you should bring a Fire Pokémon like Magby o Houndoom. Common fire attacks like Flame Charge or Flamethrower can free these two for at least half their HP per hit. Better yet, Magby and Houndoom can both be found within the Grand Underground Hideaways at level 50 or higher at this point in the game.
Since Spiritomb is only weak to Fairy Pokémon, this is where or yours Dialga o Palkia it should come in handy. Honestly, any move other than Fighting or Psychic-type should work, but we recommend that you mainly use the powerful Roar of Time attack against the Ghost Pokémon.
Related: All Legendary Pokémon in Pokémon Brilliant Diamond and Brilliant Pearl