Like most other regions, Sinnoh also has a wide array of Gyms that trainers can battle to obtain badges and to be able to qualify for battle and face the Elite Four. The Sinnoh Gym Leaders are Roark, Gardenia, Maylene, Crasher Wake, Fantina, Byron, Candice, and Volkner. As you can see, the Gym in Eterna, Veilstone, and Hearthome were remodeled and enhanced with new features in from Diamond and Pearl to Platinum. Also in Platinum, some of the Gym Leaders have more powerful Pokémon than in Diamond/Pearl. Sometimes to get stronger in Platinum after you beat the Pokémon League, you can go to the Battle Zone where the Survival Area is to rebattle the Gym Leaders.