The seasons change by the moths. So after a month of winter, it will become spring. Also you can change these in the DS menu where it has the months saved on it. Just change the month and the next time you go on to the game, it will still be winter. To change this just go into a builiding and come back out then the season will change.
In the middle of Twist Mountain when it's winter.
route 13, Twist mountain, only in winter
Spheal can be found in Undella Bay while surfing during the winter.
No, there are no legendary Pokemon there, just a rare item.
Tuesdays, in Spring, Summer and Autumn. They do not sell cones in Winter.
August 1.
SHE IS IN UNDELLA TOWN 1st house next to the pokemon center
You get HM Waterfall at the end of Route 18 on the strip of grass in Pokemon Black.
only in pokemon black. (n's castle)
Cheat and turn the season to Winter.
In the middle of Twist Mountain when it's winter.
No, you do not. Since you can't trade back.
Change the month on your DS. Go in and out of the pokemon center until winter comes.
You have to beat the Pokemon league. The Pokemon Zekrom/Reshiram will be at the end of the next dungeon. *no spoilers*
at the end of the game you will met him
go to the stand on Tuesdays on Autumn and spring and summer. unavailable in winter.
route 13, Twist mountain, only in winter