Ancient Relic.
there aren't any friend codes for red & blue rescue..veronica
It makes Pokemon join you more frequently.
have a high level Pokemon with a friend bow
There's a list of all the Pokemon in that friend area that is found IN GAME when you go to a certain friend area
You keep fighting them holding the friend bow
GET THE FRIEND AREA"SKY BLUE PLAINS"FROM RESCUE MISSION.
check gamefaqs.com
at final island
Fight him alone with friend bow
Ho-oh.
in blue rescue team you are a pokemon, so you cant catch pokemon, you are friends with them.
When rayquaza asks to join the team you automatically unlock its friend area.