Scroll down to read our guide named Easy way to defeat all gym leaders for Pokemon Diamond on Nintendo DS (DS), or click the above links for more cheats.
Easy way to defeat all gym leaders
Roark: With Piplup as your starter, you can beat Roark with ease if it is above level 12. If you already have Prinplup, it will be ultra easy. Gardenia: Catch a Buizel at Valley Windworks, and then you can trade it in Gardenias town (I forget the name) and have a Prinplup know Peck. Be careful of her Roserade, though. Maylene: If you have a level 30 Flying type and a fighting type, it will be very easy. Crasher Wake: Have an Empoleon for the resistance, and have a Raichu for the offense and it will be easy. Fantina: This one is a little hard, but if you have Empoleon that knows a strong water-type move (Brine is recommended), it will make it a little easier, and if you have a Drifblim that knows Ominous Wind, it will be a little easier. Byron: If you have Empoleon, Machoke, and a good Fire type, youre unstoppable. Candice: This one is very hard if you have Torterra, but if you have Infernape, youre good for the majority of the battle. Just switch to a flying type when she brings out her Medicham. Volkner: This battle is very hard, but if you keep your ground with a good Ground type or a Dialga that knows Earthquake, youre good for the battle. If you have a Ground type, switch to an electric type when he uses Octillary.