Can someone help me?

I think...I think you need a high-rank monster (Like A or S) and then on like the first of some month the event should trigger...unless you are still missing orbs...No, I don't believe that that was your only chance. Sorry for the vague info, I'm not even sure I'm right. I haven't gone after the Pheonix for some time since I already have the thing.

This is how you unlock a phoenix. B)

Note: You must unlock Dragon, Durahan, Joker, Zan, Gali, Henger, and Monol before Step 3 will occur. The items must be used!
1) Beat Emperor's Cup and collect all six Orbs. See thread in FAQ on how to do this.
2) Make sure you have a good monster and raise him until Jan 1.
3) On January 1, Mardoc will come by. The Flare Orb will absorb the other Orbs.
4) The orb will bring you to Promiass ruins. Take the orb to the Phoenix Altar which at the true northern point of the map.
5) The Flare Orb will summon a Phoenix named Rampage. It's stats for me were as follows:
Pow Int Acc Spd Def Lif
387 604 500 490 380 427

6) Defeat the Phoenix and you will eventually receive the Feather.
7) Use the Feather as a combining Item and you will get a Phoenix!!


Note:plsssss. tell me how to unlock raiden xD