Direct links to GameFAQ pages don't work, so I'll paraphrase for your benefit;

Quote Originally Posted by GameFAQS
Adamantine (Long horn island some where north west)- defeat Adamantoise
or Change Minotaur card into item.

Dragon Fang (Island closest to hell and Shumi tribe area)- From Blue Dragon
w/RARE ITEM ability receive as a battle prize or w/LVL DOWN ability from
Tonberry Level him down between 1-10 and receive it as a battle prize.

Pulse Ammo (Lunatic Pandora)- Elnoyle w/LVL UP ability from Tonberry level him
up 50 to 60 and receive it as a prize w/RARE ITEM ability receive Energy Crystal
and then change it to a 12 Pulse Ammo, or change Lazer Cannon 5
Pulse Ammo/Power Generator 20 Pulse Ammo.
That should about cover it.