Route 6 is where you get sent to retrieve the special artifact and fight lots of Team Eclipse grunts until the top where the artifact gets placed onto the pedestal and Groudon awakens.
Gym leader Sebastian runs in and apologizes to Groudon for its awakening.
Groudon goes back asleep afterwards, allowing the trainer to fight in the Brimber City Gym to obtain the Brimstone Badge.
After Route 6.
All Pokemon found here are between levels 9-11.