you cant. you can only do that with Pokemon heartgold and soulsilver.
No.
pokemarts are in the pokemon center.You'll see it on the right when you walk in.
Walk up the stairs.
You walk...
Walk to the left of the forest
Unlike in HeartGold and SoulSilver, you can't walk with your pokemon in the new games. I see why you'd expect to be able to, though.
Sadly, no. But it is still an amazing game!
You get a certain Pokemon that cuts the steps you walk but it depends on the old versin of black or the new versin
complete the game then just walk there
It takes a few minutes (7-10) to walk 2,101 step in Pokemon Black.
Route 18. Walk around in the dark grass.
walk around a bit, eventually you'll find it;)