Just walk into the long grass north of Pallet town, and oak will allow you to pick one.
You can just breed your starter Pokemon with a ditto to get a egg of your starter Pokemon in Pokemon leafgreen or firered then trade them.
Trading, migrating from LeafGreen or FireRed, or cheats.
Kanto starters are not available in Sapphire you'll need to trade them from Firered or Leafgreen.
If you picked Bulbasaur as your starter Pokemon, Entei can be found roaming around Kanto after you beat the elite four.
FireRed has the same legendary poke'mon as LeafGreen. You can capture:- Mewtwo in Cerulean Cave Articuno in Seafoam Islands Zapdos in the Power Plant Moltres in Ember Island Lugia in Navel Rock Ho-oh in Navel Rock Suicune roaming around Kanto if your starter is Charmander Raikou roaming around Kanto if your starter is Squirtle Entei roaming around Kanto if your starter is Baulbasaur Jirachi roaming around Kanto
Entei doesn't have a specific location, but they are roaming around Kanto after you beat the E4, get the National Dex, and give the Ruby and the Sapphire to Celio. The legendary dog that runs around Kanto is based on the starter that you pick. When you pick Charmander as your starter, Suicune roams around Kanto. When you pick Squirtle as your starter, Raikou roams around Kanto. When you pick Bulbasaur as your starter, Entei roams around Kanto.
kanto
Anywhere in Kanto after you beat the game using a Charizard. Suicune will only appear if Charmander was your starter pokemon.
beat the main character from firered and leafgreen, then obtain a kanto starter from professor oak and a hoenn starter from steven in silph co.
The Kanto region games have these Pokemon as the starters in the beginning. This includes Pokemon Red, Blue, Green, Yellow, and FireRed, LeafGreen.
In Pokemon Heartgold and Soulsilver you can get a Johto starter from Professor Elm, a Hoenn starter from Steven, and a Kanto starter from Professor Oak
im sure it is 250 or 350 Pokemon from Kanto region and not so sure about the ones in Hoen region...I think i have the full Kanto dex, cuz underneath seen it says kanto then national, so yeah lol... I have 146 seen in Kanto and 99 owned I haven't done so yet, but I bet you have to get allPokemon from the Kanto, Johto, and Hoenn regions, which, in total, would be 386 Pokemon (to get the other starter Pokemon from FireRed, trade from another FireRed/LeafGreen)