You get HM-surf get the badge so you can use it outside of battle and then go to pallet town and you will be able to get to the ocean there and you ride your Pokemon all the way there... you will have to fight some people.
you can't they only put that in on the remakes of the game (firered and leafgreen)
Cinnabar island
you have to go inside the dungeon on that island and find the exit on the other side
first go to cinnabar island second loo for the keys at the pokemon mansion
Go to birth island.
you catch it at mt.ember in one island. you will be able to go to one island after defeating blaine, the gym leader of cinnabar island.
On cinnabar Island, to the left of the pokemon center, lies a "laboratory". If you go inside, then go to the right and enter the third door. Talk to the Professor there.
you have to go into the pokemon mansion on cinnabar island and navigate your way around there untill you find the key
just go to your local Port and catch choose to go to whatever Island you want to.it is at vermilion city.defeat all gym leaders then go to cinnabar island
you have 2 have @ least 5 badges than you go 2 pallet town and you sail on the water
go to seafoam islands which is next to cinnabar island and you will need surf which you could get in the safari zone
ok this is how you do it 1.go to vermillion port 2.you need the cinna pass to go to cinnabar island 3.you need to defeat the 2 gym leader to get the water badge