What do you do in Pokemon firered after you become the champion?

Answer 1

First you have to catch all Pokemon, Then talk to profeser Oak and get the National Dex, After that you go back to One Island and talk to the guy at the huge macheine in the Pokemon center. He will tell you he need a ruby and a sapphire. He will give you a rainbow pass that will let you go to islands 4 - 7. You can now catch most 2nd Generation Pokemon, Unknown and a new team rocket storyline is unlocked.

Answer 2

You should go to the new islands that are unlocked after beating the champion, when you are done with islands 4-9 and finsihed Bills new machine, you should go to champion cave and try to capture Mewtwo. Have fun :3

Answer 3

Go back to one island and go inside Mt ember go into the secret cave the rocket grunts opened for you then inside the cave find the ruby then give it to celio he will give you a rainbow pass which allows you to sail to islands 4-7.

Answer 4

Go back to one island and find the ruby in mt ember give to celio then you get a rainbow pass which will let you go to islands 4-7.