Im pretty sure you can't. You'd have to find another way around them. Sorry!
Should be on route 19.
route 19 in heartgold and soulsilver route 219 and 221 in diamond and pearl
Swimming on Route 19.
you have to first get past the snorlax in the way of the entrance to digglets cave and then go through it and you will know what to do from there.
yes in Route 19Rarity:SwarmTo get Clamperl you need to listen to Prof. Oak's radio show and they will announce a Pokemon that is swarming around a route you just need to wait until they say Clamperl is swarming around Route 19.
With Dowsing Machine: Route 32, Vermilion City. Without Dowsing Machine: Violet City, Cianwood City, Dark Cave, Route 19, Rock Tunnel, Victory Road.
You'll need to use the Super Rod for all of them, except Cliff Cave. Cherrygrove City, Cianwood City, Olivine City, Route 19, Route 34, Route 40, Seafoam Islands, Union Cave, and Whirl Islands.
get to fuchsia city go down and you will be in Route 19
you can't sorry. but to get to seafoam islands or cinnabar island, surf from pallet town. to do that wake the snorlax and go through the tunnel to the right of Vermilion city. hope this helps!
Outside of Digglet's Cave, another place (I forget), and then route 21 or 19 I'm not sure which. There may be other spots but by this time I had caught him. He is at level 50 when you catch him.digletts cave
The Pallet Town gym leader on Pokemon Soulsilver is on Cinnabar Island where the volcano erupted, which you would know if you attempted to take route 19 from Fuchsia City like many did. You can get there when you go south from Pallet Town but make sure you have a Pokemon that has learned the HM Surf and try and bring a grass-type Pokemon because route 21 is completely water and the Pokemon are water, too.
They won't leave until after you have beaten Blaine (and maybe Blue/Gary as well)