Find the Ruby inside Mt ember and then give it to Celio.
With the Rainbow Pass.
The rainbow pass is a key item in Pokemon FireRed version. To trigger the events to get it, you first need to own 60 different Pokemon.
beat the elite 4
You need the Rainbow Pass
You can't because the Rainbow Pass is a Key Item which can't be traded without a hack or glitch.
It is not possible to obtain the rainbow pass in Pokémon Emerald. It is only available in Pokémon FireRed and LeafGreen.
Go to Vermilion and hop on the fairy. note: you need the tri pass or the rainbow pass.
beat the elite four then talk to celio on island 1
You have to get the ruby and give it to celio. He will then give you a rainbow pass
Yes, Celio from One Island will give you the Rainbow Pass after you bring him the Ruby you find in Mount Ember. Of course, you can not get there unless you have beaten the Elite 4.
It is not possible to get rid of Key Items such as Bicycle and Rainbow Pass. Also, if you "got rid of" it then you would no longer be able to go to the Sevii Islands, and do you really want that?
Talk to Celio on One Island. (I think you have to beat the Elite Four first)