17.
Indeed~
It's a Kendama noo tara, it's a sword and the sphere is rainbow colored, I think. I haven't used it in a while, but I can turn back on my game and see. The Crack Weapons aren't their most powerful weapons, sooo. XD;
After the Flanoir event, you can go to Meltokio and activate the 'Princess' event, in which you have to save the Princess. After that, the King will say that you're invited to the Formal Dinner they're holding, and that is when you can get Lloyd's and three others' Formal Wear (which means yes, it'll take you several playthroughs to get 'em all. Even more so for the Swimsuit wear -- I still don't have Regal's.)
It's me being a total ToSTard Jordan. :D