Here some guestions I got to answer. How do you breed pokemon?

You breed Pok�mon at the multi-capacity daycare on Island 4. The Dog will be roaming around the Kanto mainland � Raikou if you started with Squirtle, Entei if you started with Bulbasaur, and Suicune if you started with Charmander.

You breed Pokemon by putting a male and female of the same Pokemon (for example, a male and female jigglypuff) in the day care center on four island.
Only one legendary dog shows up in the game depending on what starter you chose. If you chose Charmander, Suicune will appear randomly, if you chose bulbasaur, you will find Entei, but if you chose Squirtle, Raikou will show up.
Hope I helped!

The answers to the first and second questions are you put them in the daycare on 4 Island. You could breed a male and a female or a male/female and a ditto. You catch your legendary dog after you beat the elite four in the Kanto region. You have to look hard. There is no set place to catch it. The legendary dog you catch depends on your starter.
Squirtle- Raikou
Charmander- Suicune
Bulbasaur- Entei

The answers to question one and two are you can breed Pokemon at island five or below Cerulean city.
I would say it's quicker getting to the ceruleon one but he will only look after one Pokemon, the five island will look after two so you can breed.
The awnser to three if you choose Balbasaur ,Entei will run around Kanto randomly after you have beeten the Pokemon leauge once,if you choose Charmander you will see Suicine and Squirtle you will see the electric legendary dog. You will only SEE one dog per pokemon. Either use a gameshark or trade with a freind to get all three dogs.
Im happy to help.
If you have any more Pokemon questions you need to know ASAP then post them.

You breed Pokemon at the second day care center which is on four island.
You have to trade the legendary CATS from Pokemon colosseum.(its a pain I know it's set up so you can't get all 300 and whatever unless you got fire red leaf green ruby sapphire and colosseum).

Breeding: You have to put a male and a female in the daycare( make sure they can breed.)

Island: You breed them on 4 Island when you get out of the harbour thing just walk up and it will be there.

Dog: You have to have beaten the elite four and have the national dex(since there jhoto pokemon) and you can find them anywere in the wild once you have done the above things. You should check for the legendary dog on route 1 because me and like three of my friends found our legendary dogs there.