Head over to Seafoam islands where Articuno is located.
up the stairs in seafoam island
bottom floor of Pokemon Mansion
You need to acquire the Secret Key that can be found in the basement of the Pokémon Mansion and then you can use the Secret Key to enter into Blaine's Gym.
Blaine's Gym is in Mahogany Town.
Go to seafoam islands, and climb the latter.
you can try putting them in the pc. they give you way more options of things to do with your pokemon.
you talk to the old man in viridian who teaches you how to catch pokemon. When he asks if you are busy say no. Then fly to the island with Blaines gym on it and surf right were the land meets the water. hope this helps
you find articuno at the end of seafoam islands, but go down the stairs not up the ladders, up the ladders leads you to blaines gym. hope this helped :)
Go to Blaines gym underneath there is a series of floors which lead to Articuno
Blaines Gym now resides in the sea foam islands when you enter the islands take the ladder and you'll be in his gym.
They are in these cities. Pewter,Cerulean,Vermilion,Fuscha,Saffron,Celedon,& Viridian. Blaines gym is at the seaform islands.
you dont just try 2 chase it lol