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.
When rayquaza asks to join the team you automatically unlock its friend area.
There are hundreds of Pokemon that you can recruit in Pokemon rescue team. It would take hours to do everything. After you beat the game then you can recruit more Pokemon and buy more friend areas.