I have never gotten to play online mission mode with anyone, so if you want to play and know how to set it up, reply to this because it sounds awesome, i also have birth by sleep and haven't played the mirage arena online either so if you want to play let me know

days and BBS are both local multiplayer only. But if you have a PS3 you can download something called AdHoc Party. Now when you want to use adhoc your ps3 need to be connected to your router with an ethernet cable because the psp is going to connect to the ps3 using wireless

I've only ever been able to do it with my sis, because I convinced her to get the game as well. But no one else has the game near me, so I won't be able to play with anyone else.

its only local, F#$K

Yeah, that's one thing I don't like about Kingdom Hearts. We've got games like Pokemon with Wifi, and yet no KH game on the DS or PSP has Wifi, just local wireless.