Tornadus does not evolve.
You can not counter Tornadous in white, he's only in black. The only way to get him is to link trade
It is suppose to evolve at the Level of 20,but if you want it to evolve later it can evolve anything after it is at Level 20.
It will evolve by level. Teddiursa will evolve into a Ursaring at level 30.
They evolve at level 36
It will evolve at level 36.
They evolve on level 40
it evolve on level on 64
if you dont let it evolve at the required level of level 20. itll try to evolve at every level following.
Pikachu do not evolve by level. They evolve when a thunderstone is used on them.
To evolve a Sandshrew level it up to Level 22 and it will evolve into Sandslash.
Kricketune does not evolve, but a Kricketot will evolve into Kricketune at level 13.
You can't. You can only get Tornadous in Pokemon Black version. You could get Thunderous in only white version. You can get Tornadous in Pokemon black by talking to the old lady on route 7, seeing Tornadous after the old lady shows it to you, and luck ...( sort of ) . When you search for Tornadous you will search for a route that a storm is occurring at. When it is raining and you are in the grass , put a Pokemon that is a lower level that 40 ( preferably 38 or 39 ). After each turn he will flee. If you lower his hp, the next time you encounter him he will have the same hp. It took me 17 times of meeting him before I captured it. i suggest doing this at night and using a Dusk Ball.