I only had mine after defeating the game for the first time :)
I do this for pretty much every FF game. I defeat it first without any help, and then do another go with a guide to get everything 100%
Granted, Ozma was pretty easy to find, even for the first playthrough. I had followed the friendly enemies through the game as well, so when I found Ozma, he didn't had any of the buffs.
My second go was with Ozma buffed up to the max, but there's a glitch on the game, since if you fight him as Lvl 1, he only does % HP Doomsday damage, which never kills any of your characters throughout the fight xD The hardest part is to reach him in LVL 1 :P
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"