Pokémon Diamond and Pearl/The Elite Four

The Elite Four are the last bosses. After defeating them, you face the champion.

Aaron
As the first member of Elite Four in Sinnoh, Aaron is a Bug-type expert. He has a variety of Bug-type Pokémon, ranging from Level 53 to Level 57.

His main strategy is to induce status problems on his opponents and deal damage directly or indirectly. Without using status-healing items while battling, it is quite difficult to defeat him.

His Pokémon are, , , and.

Bertha
She is the second member of Elite Four and is a Ground-type master. Her Pokémon are, , , ,and. If you chose Torterra as your starter, you will have no problem in defeating Bertha. All of her Pokémon can be easily defeated Grass-type attacks. Whiscash may be Bertha's most dangerous Pokémon of all, wielding the deadly 1 hit K.O. Fissure, so once she sends it out into battle immediately launch any powerful attack you have at it (A well leveled up Torterra can take Whiscash down with a single Giga Drain). Once Hippowdon is sent out, you may hit a snag, even with Torterra. It is weak against Grass-type moves, but it has high enough defense to withstand a few attacks before it goes down.

Flint
While focusing on Fire-type Pokémon, Flint mixes his team with various Pokémon with different types to stand an advantage against his opponents. His Pokémon are, , , , and.

Lucian
Lucian is known to read books in between matches. Most of his Pokémon are dual-type. Lucian's Pokémon are, , , , and. Using a lot of items and strong Dark-type moves, he is a tough trainer to defeat. The main strategy to bring about Lucians downfall is to head into battle with at least one or two strong Dark-type moves at the ready. You can make easy work of Lucian's Mr. Mime, Alakazam and Girafarig with a Dark-type move such as Crunch, but when it comes to Medicham and Bronzong, you need much more than that. Medicham can at times be lethal, especially with damaging and health restoring Drain Punch. If you can maneuver around and survive assaults from Medicham, you can defeat with a few well placed moves You can either steadily and most often unsuccessfully hack away at Bronzong health, or if you were lucky enough to choose Chimchar as your starteror catch and train a Ponyta, you can quickly dispatch the Steel-Psychic type with a hardy fire move.

Cynthia
Cynthia is the first female league champion in the games. Her Pokémon include, , , , , and. Cythia starts out with Spiritomb, who to your disadvantage, is weak to nothing and completly resistant to Normal, Fighting and Psychic-type attacks. Just throw any attack you have at it to bring the ghost down. Grass-type moves will send Gastrodon down with ease, Grass-type moves will also easily dethrone Milotic, but when usinga Grass-type, be wary of it's deadly Ice Beam. You can make quick work of Lucario with Fighting and Ground-type attacks. Grachomp, Cynthia's highest at level 66, can be a nuisance with it's heavy-damaging Giga Impact. If you have been playing Diamond, you will probably have Dialga in your party. If you have a Dialga on you, just bring it out, and rip through Garchomp with a combination Dragonclaw, Roar of Time. If you don't have Dialga, just strike resistance with whatever Dragon or Ice-type moves you have at hand. Roserade may be the easiest of Cynthia's Pokémon yet, with many weaknesses you can quickly defeat Roserade.