yes
you need an action replay with walk/run anywhere on. all you have to do then is go through or around it.
you cant
Catch trainer Pokemon
you could use action replay but if you dont have action replay train at the Pokemon league which will take about a day depending on its level when you start.
through the Action Replay
If you go in,you can't.(unless you have an action replay.)
you use an action replay use an action replay
what is the action replay cheat on Pokemon diamond for run through anything
Action Replay
Action Replay Wich is a cheat Or keep doing the pokemon league
get action replay!
you have to have a action replay for ds