if you mean the time gate in those episodes of pokemon bw: rival destinies, it does not exist in the pokemon games and is only used to create a story in those specific episodes
Defeat Elena first, then you go to Route 5.
i think its tundrus on Pokemon black so maybe its tundrus to in Pokemon white
yes you can find it in Pokemon white. go to www.serebii.net for more information about where to find it.
Get 8 badges
Go up and right from Opelucid City. Then you will see a gate. Go through the gate to the Badge Check Gates. You must have all 8 Badges. After the last path you will be in Victory Road. Save the game.
you have to go through giant chasm until you see a cave exit on the western side. then go through route 23 and you will arrive at the badge check gate. victory road is at the end of that gate.
On the side where the woman lost it, go to the exit gate. (Don't go in though) Take 2 steps north, and it is on your right. She will give you a white Flute which makes Pokemon more likely to come to you.
You go to route 5 then you will see him then he will go to the Pokemon league then go to the top floor of victory road then battle him
Go to the White House in Washington D.C. Ask at the gate "How much for George Bush?" Go to the White House in Washington D.C. Ask at the gate "How much for George Bush?"
Go to White Forest and Lotad will pop up some time Good Luck!:)
thundurus is a roaming pokemon. go to route 7 and keep going till an old lady stops you, say yes to soup, and go to right, and thundurus will stop you, and leaves. go to any gate, and read the board. it will say that a specific route has a storm. go to that route, use max repel, and go in grass.
from Hearthome City, if you go down through the gate than you will find it