in bills house...just stay there for 7 hours and he gets anoyed and gives it to you but first you must beat him in a battle..he has an eevee level 100
You need the rainbow pass to get there. That means you must help Celio finish his machine.
Trade, Train, Evolve, Catch, Breed all the pokemon!
You cannot 'finish' Pokemon LeafGreen and FireRed. You might be thinking about defeating the Elite Four. That is the end point of most trainers, but you can go ahead and capture legendary Pokemon like Mewtwo, Lugia and so-on.
No but it is essential to trading with other games.
To get Suicune you need to had chosen Charmender for your Starter Pokemon .Then finish the Elite Four .And
Celio is not a character that appears in Pokémon Ruby instead he is a character that appears in Pokémon FireRed and Pokémon LeafGreen he appears in the Pokémon Center on One Island and is in charge of the Network Machine you as the Player Character are required to find the Ruby and Sapphire items in order for him to finish work on the Network Machine so that your games can trade with games such as Ruby, Sapphire and Emerald.
You can only get inside when you fight finish the Pokemon league .
you have to trade all of the hoenn-exclusive Pokemon from a Pokemon ruby/sapphire/emerald cartridge
...? umm this question doesnt make sense. you do it by seeing Pokemon! all the Pokemon in the game! (no trade)
When you obtain the ruby and sapphire
You must defeat the elite four and the Pokemon champion then catch all the Pokemon which is only possible with help from friends.
start with bulbasaur an finish the game (includeing n dex) and done