How do you get the gym leader back in hearthome city in pearl

In order to get Fantina the Gym Leader back to her Gym in Hearthome City in Pokémon Pearl, you first need to beat the first 4 Gym Leaders who are Roark in Oreburgh City, Gardenia in Eterna City, Maylene in Veilstone City and Crasher Wake in Pastoria City. After beating those 4 Gym Leaders you can return to Hearthome City. Talk to Fantina outside of the Contest Hall and she'll return to the Gym however if you've already spoken to her earlier on outside of the Contest Hall then she'll already be in the Gym.