I consider this to be the #1 Final Fantasy IV site.
It has Amano art, custom GIFs, armor guide, beastiary, character
info, character skills, dropped items list, Game Genie cheat
codes, tips, item guide, level listing, magic list, monster
attacks, side quests, status guide, story summary, town/shop
guide, full walkthrough, weapon guide, and a location guide.
There's even a comedy portion with several sections containing
lots of hilarious FF4 stuff. ^_^