What do you mean by leaving
No. You have to beat the Pokemon League and then you'll have access to the sky pillar on Route 131. But before you go to the Sky pillar, make sure you have a mach bike instead of an acro bike.
You have to have the three starters to get a bike at the pokemon fan club
Go to Vermilion City. Go into the Pokemon fan club, really close to the POKEmon center. Talk to an old man there and be will tell about his favorite Pokemon Rapidash. For listening to his little speech he will give you a bike brouchour. Go to the city that Kasumi lives, I think it's cerulean city, go to the bike shop, and give the man the bike brouchor,and he'll give you a bike. You can now ride on the cycling road. Before you go, let Nurse Joy heal your Pokemon at the Pokemon Center
If you mean the Acro Bike and the Mach Bike, you can't get it in Pokemon Pearl.
on th bike path heading south before you go out of the little border or watever there is a guy that gives it to you if you've seen 30+ Pokemon
In cerulean city (You will need to get the Bike Voucher from the Pokemon Fan Club in Vermillion before being about to get a Bike)
In Cerulean City. You have to go talk to the Pokemon Fan Club Chairman in Vermilion to get the bike voucher before you can get the bike though.
than you should be able to buy it, but when i tried it didnt work?
No. You have to beat the Pokemon League and then you'll have access to the sky pillar on Route 131. But before you go to the Sky pillar, make sure you have a mach bike instead of an acro bike.
There is not a bike voucher in Pokemon sapphire
If you go to your bag and head to the key items pocket choose an item like your mach bike or acro bike then choose register now press select after leaving the bag menu and you will automatically ride your bike.
you use a bike and you will get over the floors before they break
You have to have the three starters to get a bike at the pokemon fan club
Go to Vermilion City. Go into the Pokemon fan club, really close to the POKEmon center. Talk to an old man there and be will tell about his favorite Pokemon Rapidash. For listening to his little speech he will give you a bike brouchour. Go to the city that Kasumi lives, I think it's cerulean city, go to the bike shop, and give the man the bike brouchor,and he'll give you a bike. You can now ride on the cycling road. Before you go, let Nurse Joy heal your Pokemon at the Pokemon Center
In Pokemon HeartGold (And Pokemon SoulSilver) The bike road is on Route 17 in the Kanto region.
You get a bike in ramion city
The Bike Shop...........