I got a list of weird ones which include some of the ones listed already

Wakka's Blitz Ball. (Does he have to go run and get it after he uses it if it doesn't bounce back to him. Or it just magically comes back like it's on a retractable string.)

Vanille's "Rod's" (She actually throws the line out in that thing must be 200-300 yards. during chapter 9 i think it is. Where is that much line stored at?)

Relm's Paintbrush (A paintbrush that can paint without any paint cans. And the paintings do damage, how about that.)

Edgar's Noiseblaster (Sure the concept is nice. Big noise to confuse the enemy, but where are all the earmuffs so you dont confuse yourself?)

Edgar's Autocrossbow(Very nice weapon indeed and you never ever ever ever have to buy any arrows. I guess Edgar spends his day picking up arrows off of the enemies that you kill.)

Edgar's Flash (How does this do damage. The concept to me seems that it should just blind every enemy. Maybe Edgar is shooting nuclear beams of light at the enemy?)

Snow's Coats (Ok this one makes absolutely no sense. I am going to wear this coat because it makes me stronger...what!? Snow is exactly like a matured Zell except bigger and more fun to have in your party.)

Squall's Gunblade (Its a sword.. no its a gun... no its a ....Gunblade? [1 year before ff8 came out, two guys arguing] (Man swords are so much cooler than guns. guns just go bang and thats it, nothing special. 2nd guy says but guns so much stronger than swords. guns can shoot from distance. Another guy walks in and says "We'll do both", What?? the other 2 said. A gun and sword mixed? Gunblade was invented. Sword guy jealous that word "gun" at beginning of gunblade so he tweaked it so you can't use it as missile weapon.)