It only specifies that a Thundurus will appear in the evening, and it is rare. So evening is usually around 7pm but it's whenever the screen goes dark :) And it may take a while.
Because maybe thunderus is there :| Hoped that helped
If you mean WATCHHOG he doesn't evolve. he is the highest form you can get.
In the grass of Route 6, Route 7 and in front of Dragonspiral Tower.
There is only rainbow ponytas' in Pokemon battle arena, you can get them and find the rarely on route 7.
If you go near Opelucid City, and run to Route 9, you can walk inside go up the stairs in the middle, and you'll find a man in blue and yellow. He will ask you if you know about the thunerstone, you reply with yes, and you get a thunderstone! =)
you have to get 7 badges.
in pokemon black 2 twist mountain is on route 7
in pokemon black 2 twist mountain is on route 7
Breed Zebstrika (Route 3, 7, Hidden Grotto - Route 3)
Thundorus is a roaming Pokemon and you have to go to a house on route 7 and talk to a lady and she will tell you about him. then when you go outside he will be there but if you dont capture it in the first try he will flee. to get his location you must look at the notice boards to between routes to see were it is raining.
Mistralion City poke-center 50000
You will find it naturally on the upper floors of Celestial Tower (the memorial tower on route 7) on both Pokemon Black and Pokemon White.
North of route 7 and enters onto Icirrus city
If you mean WATCHHOG he doesn't evolve. he is the highest form you can get.
Twist Mountain is to the east of Route 7 and to the south of Icirrus City.
sentret
Earliest Lv30s you'll encounter are on route 7 in the double (darker green/turquoise) grass.
no