get 7th gym badge and go to goldenrod city. team rocket will have taken over the radio tower. beat them completely and then the guy will let you pass.
Get the natinal dex
You'll need to defeat the Elite Four and Prince N, then you can access to Route 11.
if its the guy that tries to rip you off buy buying a slowpoke tail just say no and he will move out your way
There is, in fact, no route past route 24
you can go behind them in heart gold soul silver I'm not so sure good luck
you need to fight them to get past
Complete the pokedex.
You have to beat fantina the 3 gymleader then they move.
you get the National Dex.
get natinol dex!
Get the natinal dex
get the HM Defog
You must complete spear pillar and then he will leave
You'll need to defeat the Elite Four and Prince N, then you can access to Route 11.
Defeat Team Galactic on Mt. Coronet.
By touching his private parts and licking it:)
complete the sinnoh dex.hope this helps:)