Where exactly can roaming pokemon appear? Is it anywhere where there is tall grass?
I am specifically wondering about Mesprit and the Battle Zone, in Pokemon Brilliant Diamond: Routes 225, 226, 227, 228, 229, and 230.
None of the wikis on the Internet (Bulbapedia, serebii, etc) for these routes, or any other route where I know a roaming pokemon can appear, list the roaming pokemon on those pages. The Roaming Pokemon pages don't list the possible locations for them.
The closest I can find is this tweet showing some of the code.
