IF you mean blue rescue or red rescue, the Celebi will join without a fight, but that's the only one, and he is DEADLY HARD to get to. you remember the dungeon you enter alone at level one without items? It's called purity forest, and it has 98 floors, the 99th has Celebi. If you mean time or darkness, nobody joins without a fight. some have a 100% recruit rate, but you still have to battle them.
fight them good and then they might ask to join you!!
To recruit you have to fight wild Pokemon in places where when you go under menu click on other and there is a tab called "Recruitment search" and open it if you can recruit and Pokemon will join your team there will be a list of those Pokemon BUT if you cannnot recruit or Pokemon will not join your team it will say "no Pokemon will join the team in this dungeon" if there is a list of what Pokemon will join your team you may fight those Pokemon and if they like your team they will ask to join your team if you like the Pokemon you can say yes if not say no I usually try to do is fight Pokemon and then train them in high level dungeons until they are high then continue on my journey usually if you cannot recruit it means you usually cannot bring recruited members.
fight him again
you have to fight 130 unown at the solaceon ruins without escaping then the first Pokemon you will fight is celibi lv.30
you have to fight them when u first go in your journey.Than when finish the game than go back to where they are than go fight them again until they ask to join your team
you have to go to the solaceon ruins and fight 130 unown in a row without retreating then the first Pokemon you fight outside will be celibi lv.30
you cant "join" Pokemon, but you can make babies with two Pokemon
You can train your Pokemon by battling Wild Pokemon, fight new Trainers, or fight new Gym Leaders. It is recommended that if you are going to battle wild Pokemon, you should fight Pokemon relatively close to your Pokemon's level. Fighting new Trainers will provide more Experience Points than fighting wild Pokemon, though, making the training go by quicker.
Pokemon indigo is a very nice website with rooms that you can catch legendary Pokemon without having to fight all the gym leaders!
You just fight and defeat them and then they will either join you or they wont if you find a friend scarf though you can increase the chance of them joining you
the ones you dont fight or fight with
Join the fight Don't Join the fight!! that's going to just make it worst