i hate you right now... Hahah.. Cant get out of the dew mountain.. Any tutorials?
Unfortunately, I don't think that there is. I have seen two videos of my hack on Youtube, but unfortunately they only have the first episode and are therefore not up to this point.
I think that this issue may be that you haven't obtained the HM for flash in the Pokemon Centre on Route 905. So if not I recommend that but in case you have read below:
1) Upon entering head East towards a ladder at the end of the cave. Go down that ladder.
2) Head East again until you reach the end of the cave. By following the path you will head North.
3) You will reach a point at which you can't go forward anymore and you will head west temporarily until you reach a corner at which you will head south going around a bend (as if you were a U-turn in a car).
4) Follow the passage which will lead you North and then East. There will be two paths here that you can take, but both lead to the next ladder.
5) You are now back on the first floor. Head South until you reach the water which makes you head East again.
6) The next part makes you head North into yet another ladder.
7) Heading West and then South you will reach another point at which you will need to make a U-turn to head back up North into the final ladder.
8) Finally you will head South until it is no longer possible and then head West. You will need to move North slightly to get around a small rock barrier before continuing West yet again. Once you pass the trainer near this rock barrier you can continue west until you hit a wall.
9) At this point you head straight down and you will be out.
Once again, Flash is in the Route 905 Pokemon Centre. Hopefully this instruction list and the HM will help you. If you Need a Pokemon to Learn Flash there is at least one Pokemon on Route 905 who can learn it. I believe that I used a Magneton.
Hope this helps