you use the gold mask
It depends who your pokemon are. I found him very hard.
Darkrai becomes findable in many places the easiest place is the miracle sea 3F but is very hard to recruit i have tried over ten mabye more times no new member Darkrai very hard recruit
You get him in shimmering hill floor 17 with secret slab. However he is very hard to recruit
go to shimmer hill 17F[make sure you have mystery part / secret slab] and find him ps:he' very hard to recruit
In a very early part of the game chimecho will start its assembly. It will ring the friendship bell and you will have the ability to recruit Pokemon. It is totally random when you get to recruit a Pokemon. I don't know what the exact chances are of recruiting a Pokemon is but it has to do with your teams rank, your IQ, and if you have any helping items like friend bow. Obviously The higher the rank/IQ the higher your chances of recruiting a Pokemon are. Also if you have a higher rank and IQ you will be able to recruit new Pokemon.
A lucario is very powerful. If you think you are ready then you should recruit it. But if I were you then I would recruit it. It may be very useful for you. So don't shut off the power unless you aren't ready.
you need mystery part Mystifying forest: B13~Deep Crevice Cave:B2~Miracle sea:B3~Mt. Travail: 17 ~Spacial Rift:B14 hope that helps (VERY hard to recruit, it's a little easier to have a golde mask and then hold it)
Mt. Travail 1F - 19F Very Rare
Unfortunately, Tyranitar is very hard to recruit! He is maybe a -12% chance of recruiting. You can evolve Pupitar at Lv.55, or hold an Amber Tear to recruit Tyranitar very easily. He first starts at Lv.28 in Quicksand Pit 2F. I like getting a Male Tyranitar anyway. There you go!
The Mystery part is a item you must keep in your treasure bag and if you do certin Pokemon will start apperen dungeons here is a list. Ho oh Mistrail 19F . Lugia surrounded sea 18f. Darkrai many differet places easyiest Miracle sea 3f. Zapdos Amp plains 7f. Entei Deep Dark Crator 10f. Raikou Concealed Ruins 29f. Mewtwo Explores of Darkness only Dark crator 6f. Celibi Explores of Time only Its in one of the forest levels i think Mabey Midnight forest or Mistifing forest. Deoxus Shimmer hill 17f Recruitment levles Very easy: Ho oh Lugia Celibi easy: Entei, Raikoui,Zapdos, Very hard: Darkrai,Mewtwo,Deoxus Suggestion for very hard recruitments: GOLDEN MASK even with a golden mask darkrai and deoxus are very hard to get (i only had to kill mewtwo once to recruit him hmmm) Note you must have the part in your treasure bag for them to appeare and to recruit them.
it is very hard. I've tried exactly and counting 21 times and still refuses to join. if i were you, i would hold a friend bow and throw a sky gummie at him. that should increase your chances of recruiting him.
it is very hard. you have to get very lucky or use a cheat