You get him from an Admin. ~flickasown
Suicune is not in Pokemon Pearl. Currently you can get it in Pokemon Colosseum and Pokemon FR/LG if you start out with a Charmander and beat the Elitle Four. You would have to migrate it from a GBA game that way. It is said that you may be able to get Suicune in the upcoming games Pokemon HeartGold/SoulSilver.
Suicune is on Firered. She can be caught with a Charmander there. Leafgreen too. Trade her to Emerald.
Suicune is not in emerald so trade one from firered, leafgreen or Pokemon colosseum to get one.
Neither one of those pokemon are obtainable in Sapphire you must trade one from Firered, Leafgreen, or Pokemon Colosseum.
Suicune is not available on XD. He is on Colosseum, and FireRed and LeafGreen if your starter was Charmander.
The only way to get suicune is if you chose charmander as your starter Pokemon at the beginning of the game then after getting the national dex and delivering the ruby and sapphire to celio you can find suicune roaming around kanto use the masterball when you find it. Though if you didn't choose charmander there is one other way to get it either get it from a friend or from Pokemon colosseum because suicune is a shadow Pokemon.
The legendaries available in Pokemon Colosseum are Raikou, Entei, Suicune and Ho-Oh. Raikou is obtained by snagging it from Cipher admin Ein at the Shadow Pokemon lab, the Realgam Tower or the Deep Colosseum. Entei is obtained by snagging it from Cipher admin Dakim at Mount Battle, the Realgam Tower or the Deep Colosseum. Suicune is obtained by snagging it from Cipher admin Venus at the Under TV studio, the Realgam Tower or the Deep Colosseum. Ho-Oh is the hardest to get. You can only obtain it by beating Mount Battle in Battle mode (100 battles in a row) with your story mode party.
Suicune is not a possible starter Pokemon in emerald you must get a suicune from Pokemon firered or leafgreen.
You can get Entei, Suicune, Raikou, and HO-OH as legendary Pokemon. You ge Espeon and Umbreon as starters. Also you get a choice between Bayleef, Crocanow, Quilava as shadow pokemon.
After Suicune there is Regirock. You can find it at Sekra Range.
Suicune is on Route 25.
Suicune is a Water Type Pokemon.