Got all 13 weapons on my main, and all minions + a couple weapons on an alt. And I don't even want the mounts. They're ugly. For that matter, so are the weapons and some of the minions. I just did nearly 900 FATEs simply because leaving it incomplete would bug me.

Positive notes, though: It did give me the incentive to level up a bunch of my lower level classes. In the course of all those FATEs, I reached 30 and unlocked jobs on all classes that hadn't gotten that far yet, and reached 45 on WHM to get the first 4/5 of its AF gear. Plus for the jobs that just reached 30, those Yo-kai weapons are BiS for several of them. (I glamoured them to look like regular weapons, though. I'm not into the cartoony look.)