Yeah, Lumiose.
Basically, you have to go through the Route 14 entrance (im p sure you're there) and head west, then north. I'm not sure which part you're stuck on but here is a map.
Basically, you have to go through the Route 14 entrance (im p sure you're there) and head west, then north. I'm not sure which part you're stuck on but here is a map.