" how to get diablos to heal you "
when you open the item cid gives you it turns into a fight with a demon gf diablos its kinda hard but with this its a peice of cake. all you have to do is blind him once the is done the battle is extremely easy and if you need healing cast demi on him and if that dosent work click draw and select demi from him and cast it on him from his own magic but first try your demi and when you cast it on him he will use curaga on you

All Secret GF's!
Ok, here is how to get all of the secret GF's, from Alexander onward.

Doomtrain-Get The Solomon Ring, from Tears Point. Make sure you have 6 Marlboro Tentacles, 6 Remedy+'s, and 6 Steel Pipes, then use Doomtrain, he will be yours.

TonBerry-Defeat 20 or so Tonberry's at Centra Ruins[must obtain Odin first], then Master Tonberry will appear. Defeat it, to obtain Tonberry.

Cactuar-Defeat Cactuar King On Cactuar Island, to south of map.

Bahamut-Research Center, in Corner of map. Defeat Ruby Dragon, pick hidden option I believe, to initiate fight with Bahamut. Defeat him to obtain.

Eden-Go through the Research Center, make way to the bottom, fight Ultima Weapon, draw from Ultima Weapon