Oh more questions! Ugh. I hate not being the first to realise the next set are up.
(SPOILER)
11) Trine! I know this because so many FAQs scream at you not to fight him in Disc 1, lest you lose the skill on your fourth materia.
12) I think it was the Enemy Skill materia, but I'm not entirely confident on that. It may very well be another Chocobo Lure.
13) Oh erm... Loveless?
14) I had to actually boot up my PS2 to remember this one. It's the Yellow Microphone, Mousey!
15) All Creation isn't it?