You must beat 6 Trainers from the Gym to reach the Gym leader.
Rewards: Tour Guide From the Underworld x2, Platinum Card (not for players who have been champion and are repeating the challenge)
Gym Trainer Pool (you may challenge and beat 8 of any of these trainers to face the gym leader):
Nyan666, emperor of darks, probbins2008, Darkmaster1415, Flame61, Emperor of Darks, light of judgment, Raydan94
Rewards: Tour Guide From the Underworld x2, Platinum Card (not for players who have been champion and are repeating the challenge)
Gym Trainer Pool (you may challenge and beat 8 of any of these trainers to face the gym leader):
Nyan666, emperor of darks, probbins2008, Darkmaster1415, Flame61, Emperor of Darks, light of judgment, Raydan94