Beat the Elite 4 and get a National Pokedex. Then go talk to Celio on Island 1 and he will upgrade your Tri-Pass to a Rainbow Pass and then you will have access to the other 4 islands.
Articuno is in Seafoam Islands you need the HM Strength to get to it though and the HM Surf also you need the 4th and 5th badge.
You must beat the elite 4!Then you can go to 4,5,6,and 7.
No it's evolution only exists in 4th generation Pokemon games and 5th generation Pokemon games (diamond, pearl, heartgold, black and so on).
fuschia.
fap
Koga, he is in fuschia city, he uses poison Pokemon
the 5th gym is saffron gym with sabrina!
Beat the league once and the second they will be more difficult to beat but the 3rd 4th 5th etc. times will be just as hard as the second time.
On the 5th floor of silph co.
Zinc can be purchased at the celadon dept store on the 5th floor.
You must beat team rocket at Pokemon tower and the rocket hideout then get the 5th badge.
i suggest you start by trying all the warp panels.one of them will lead you to sabrina.