you get to the sevii islands after you defeat the Pokemon leagu
get the rinbowpass
you have to get the rainbow pass I think.
get national dex
You will find Giovani in the Gym at Veridian city
it depends what Pokemon game your playing but if it is leaf green i think in 6 island not 4 sure sorry
you can't. just stick around and train while you're there.
at island 4 in leaf green version.
You take a blastoise and a venusaur to 4 island and wait a long time. Then eventually you get a venustoise egg.
you have to find the ruby in mount ember the give it to the dude at the Pokemon center who is working on that weird machiene then he will give u it.hope i helped
get 60 Pokemon talk to professor oke he gives u the national dex go to island one talk to the guy in front the machene he gives you a rainbow pass and then it will let you go to island 4,5,6,7
you must catch a larvitar on island seven. tyranitar is its 3rd evolution stage
somewhere on 1 2 3 4 5 island