a few tips on recruiting the legendaries 

*Moltres - 30% *Zapdos - 30% *Articuno - 30% **Raikou - 0% **Suicune - 0% **Entei - 0%
Lugia - 99.9% Ho-oh - 99.9%
**Mew - 0% (Must have the item music box, the item made when the rock part, ice part, and
steel part mix,) ***Mewtwo - 99.9% **Regirock - 0% **Registeel - 0%**Regirock - 0% Kyogre
- 50% *&**Groudon - -10% *&**Rayquaza - -10%
****Celebi - 99.9% Jirachi - 99.9% ****Latios - 99.9 (Befriends at town square after
beating it at a boss battle and saving Latias) ****Latias - 99.9 (Befriends with Latios)

* means only after you beat main story plot ( battle with Raquaza)
** means you have to recruit with level recruit bonus or friend bow
*** means you can only recruit it on the second time
**** means you don't have to battle them

Rank does nothing to the recruitment rates. It was just a rumour.

Also friend bow increases joining percentage by 10%

Also also here are the recruitment rates bonuses (spelling) for your level


+5 percent at L30-39
+7 percent at L40-49
+10 percent at L50-59
+10 percent at L50-59
+12 percent at L60-69
+15 percent at L70-79
+17 percent at L80-89
+24 percent at L90-100 

Enjoy!!!!!!!!