You can just randomly search for the ID's people posted in their signature or in the Friend ID Thread.
Most will accept, maybe just give them a notification trough a private message on the forum, that you are not a random person.
On the other note, thanks to finally getting that last piercing unit so can have a perfect 5/5/5/5 Split with the Type in my Total Team. Just the final map likes to remind me that i just have 4 Piercing Types right. :/
But i really like the look of the maps with the night theme. The potential for Mid-Grade Seeds is also really nice, since some really high level players need that propably more than Manyu's. Wish they gave you the girl right away, so you could level it already. But anyway the event looks nice and ?-3 seems a good way to make me curse at RNGesus. XD
Edit: Propably won't farm the final mission for the Raid Boss, since i already need twice the raid points to slap every available one from my ally list. XD