Humilau City, but don't bother with it. The Mienfoo's owner gets all b****y if you try to watch the TV, examine the trash can, or go anywhere near the exit, even if accidentally. You have to walk the Mienfoo around the house for a long time, and all you get is a Pearl. Not worth it.
I can help a dull day go by so much faster, For I'm the rhyming fiend known as Missingno. Master.