When you arrive at Mistralton City, Skyla the Gym Leader meets you and tells you she will battle you but not now as she is heading to the Celestial Tower on Route 7, so take her advice and follow her there but heading north all the way until you see the tower, if you want you can battle all the trainers there and follow the path up to the Twist Mountain's Mistralton City entrance but you will be blocked by a Worker until you defeat Skyla for the sake of the plot, anyway go to the top to the Celestial Tower and watch Skyla ring the bell and she will head back home, so go back to Mistralton City and the Gym will be open fr business as Skyla is back in town. The Pokemon used in this gym are mainly Flying types in the low to mid 30's so you want Pokemon about L38 to L40ish, and SKyla herself has a Swoobat, Unfezant and Swanna, but after beating her you get the Jet Badge and a TM62 for Acrobatics, after this go back to Twist Mountain and you will see Alder and Cheren again, and Cheren will challenge you to a fight after which you will get a HM03 For Surf from Alder and they leave, and then you can go into Twist Mountain, I hope this helps. :)
(Winter guide) Ok so lets start from the beginning when you just entered the mountain. Go north and then east to the main room of the mountain. Now take the upper sidewalk all the way to when it ends. Now walk in the middle of the snow and go down until you find a cave on your east. But don't go in it. Instead go more east until you reach a wall and go north into that cave. Now just go north into the gold framed door. Now go east and then down. When you go down take the first path that is east. Then head north and there you go.
My other path is much more longer but if you want to know tell me. Please do not think I copied.
You don't dig for them. After the elite four there is someone there that will hand you one once a day.
There is no MT.Neji in Pokemon Black/White
Alder the champion will give it to you on Twist Mountain.
Go through twist mountain
Only Eevee, and it will evolve into Glaceon.
To get out of Twist Mountain, keep trying going into different tunnels until you get out. Hint: If you're in the center area of Twist Mountain, without any bridges, you are getting very close to the exit.
in pokemon black 2 twist mountain is on route 7
in pokemon black 2 twist mountain is on route 7
twist mountain
Twist Mountain is to the east of Route 7 and to the south of Icirrus City.
twist mountain
In twist mountain.
There is no MT.Neji in Pokemon Black/White
you have to defeat elite four
You get Surf after defeating Cheren at Twist Mountain.
Alder the champion will give it to you on Twist Mountain.
Go through twist mountain
Twist Mountain is located right before you reach Iccirus City on Route 7.