If you have a GameShark or a action replay use it to get a ho-oh.in sapphire or ruby.trade it to fire red(only fire red).this cheat will not work if you don't trade it into fire red.you can't use acion replay or gameshark to get a ho-oh in fire red because it won't work and you can't get to rainbow island. go to ninth island.save and turn off.turn back on.battle 25 wild pokemon. save and turn off,don't play for 24hours(if you don't save the cheat will not work)if you turn on before 24 hours the cheat won't work.turn on after 24 hours. look around see if there is a opening.if you see water in the opening,the cheat worked.dive.and you will see an item,pick it up and it will say you obtained the ticket.go to the ferry.and she will say i am taking you to rainbow island.and good luck searching because you might find shiny pokemon. i guanreete it will work. i did it. it worked~ it is already programed on.
Once you defeat the Elite Four, go to Celio on One Island (he's the guy in the Pokemon center who linked the islands up with Kanto). Once you find one of the gems for him (on Mt. Ember), he'll give you the pass.
beat the Pokemon league and go to one island and talk to celio he will give it to you
Celadon City
you have to get a rainbow pass
if you mean rainbow badge go down cycling road and vs koga
Head west of Celadon to the cycling road, from there go to Fuschia city to battle Koga.
you must have given the ruby to celio on island one he will give you rainbow pass which lets you go to islands 4-7.
you cant go underwater in leafgreen!!
you have to get a rainbow pass
rainbow pass
first go to cinnabar island second loo for the keys at the pokemon mansion
The rainbow pass is very helpful because it allows you to go to the islands 1-7.
To get Moltres in Leafgreen, get a tri-pass or rainbow-pass and go to one island. Then go to Mount Ember, and get to the end. There you will find Moltres.
if you mean rainbow badge go down cycling road and vs koga
Go on to chapter 5, and try to get to Sabrina and beat her
you go to the 4th gym leader. her name is erika. her strongest Pokemon is a level 29 viloplume.
you need the 8th gym badge and rainbow wing and go to the top of bell tower
Head west of Celadon to the cycling road, from there go to Fuschia city to battle Koga.
go to the elite 4
After you beat the elite four, get the rainbow pass, and go to islands 4-7. you can catch some on each island.