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! =)
Thundorus is a roaming legendary Pokemon to find him (White only) You need to reed the electric bullettin boards and sometimes it'll say a big unusuall storm is happen at route (Any number)
This is the same with Pokemon black but Its tornadus You can catch (Black only)
After getting all 8 Gym Badges, go to Route 10 and a lady will tell you about the odd weather in Route 7. Go to Route 7 and east of the Celestial Tower you will be pulled inside of a house. Another lady will tell you a story about the storm and the Pokemon. After leaving the house you will see Thundurus and it'll fly off again. It will appear randomly through tall grass, but you look at the electric bullentin boards and it'll tell you where the storm is at. Warning: it will change Routes pretty quickly so look at the bullentin boards most often.
Thundurus must first be spotted on the route to Chargestone Cave, after that you must read the Message Boards or be lucky to encounter extreme 'weather' which will indicate it is on your route. Be careful though if you encounter too many Pokemon without using Repel, Thundurus will move routes.
The TM Thunder can be bought from the lwer clerk at the Pokemart in Icirrus City.
(Information from "The Official Pokemon Black and White Strategy Guide + Unova Pokedex")
The Pokemon Thunderous is exclusive to Pokemon White, so you won't be able to catch it in Pokemon Black. The only way to get it in Black would be through trade.
In the Lacunosa Town Poke Mart.
It's not on Black, so you have to get a Thundrus with a friend who had Pokemon White
You can't, you can only find that on the white version. You can find Tornadous in Black.
You have to have both thundrus and tornadus in party and then head to Abundant Shrine.Landorus will be there and he is level 70
here's what i did, i changed the time to 16:00 (4pm) and went to route 4 keep going back and forth beteween castelia city and route 4 if you see alot of rain go in the sand and it will have a horizontal beam of light before you battle it
Victini, Zekrom, Reshiram, Tornadus, Thundrus, Landross, Kuryuum, Virizion, Terrakion, Colbalion, Keldeo, Meoletta, and Genesect. (Meloetta, Victini, Keldeo, and Genesect cannot be obtained through normal gameplay.)
It's not on Black, so you have to get a Thundrus with a friend who had Pokemon White
trade from pokemon white sorry that all ideas i have to get tundrus in pokemon black
You cannot catch Thundurus in Pokemon Black, he is exclusive to Pokemon White.
Walk in grass in an area with thunder + lightning. You'll eventually encounter him.
you can not encounter a thundrus in black so you have to trade it from white requiring natiol dex
You can't, you can only find that on the white version. You can find Tornadous in Black.
Thundrus and Tornadus is the same pokemon, but with different moves. It depends what pokemon you're fighting. But if I was you i'd go with Tornadus
You have to have both thundrus and tornadus in party and then head to Abundant Shrine.Landorus will be there and he is level 70
You can't get Thundrus, Braviary, Ruffet
You can get two thundrus by breeding ditto with thundrus but thundrus has to hold a full increase.
go to adburant shine with tornadrus and thundrus and if your talking about landorus?
here's what i did, i changed the time to 16:00 (4pm) and went to route 4 keep going back and forth beteween castelia city and route 4 if you see alot of rain go in the sand and it will have a horizontal beam of light before you battle it