Knights of the Round summon from FFVII as it does the most damage any summon will ever do if it's maxed out doing 13x 9999 damage.
Yuna is in final fantasy 10 and can summon monsters like ifrit and shiva. She is also in final fantasy 10-2.
Shiva
Yes.
I suppose so. Why not give it a try.
Knights of round
Yes, there is a trick to dodging lightning 200 times for Lulu's ultimate weapon in the final fantasy X.
There's a special item that is in the sony pocketstation's chocobo world game that you can transfer to ff8 and when used you can summon a moomba.
When your in a fight, playing as Lightning. Go to tehcniques and Summon Odin should be there, but you have to make sure you have enough TP. You need to have at least 3 TP to summon.
If i beleave rightly the damage limit in final fantasy 12 is 99,999, that is the same for ff10 and 10.2. Wereas final fantasy 1 - 9 is 9,999. Hope this helps.
Oh, dude, Anima in Final Fantasy X is like this super cool aeon you can get by completing the optional Cloister of Trials in the Baaj Temple. It's like this big, creepy-looking summon with crazy powerful attacks. You can totally wreck your enemies with it in battles. So, yeah, Anima is like the ultimate badass summon in the game.
Summon the esper Belias and examine the door before he is dismissed.
Dagger/Garnet is the first character with the summon command, but doesn't have enough magic points to summon anything. It is only later in the game that she can do so, but you will have met Eiko by then, who not only also has the summon command, but can summon eidolons straight away.