Characters that should be in Dissidia

[Sephiroth]

When I think about it:

FF III:

Luineth - EX Mode: Chosen by the Light; EX Burst: Sword of Light ---> Crystal Sword
Zande - EX Mode: Descendant of Noah; EX Burst: Power of the Mortal ---> Meteo

FF IV:

Kain - EX Mode: Dragoon Legend; EX Burst: I won't disappoint you, father! ---> Spear Rain
Zemus - EX Mode: All destroying Darkness; EX Burst: Lunarian Soul ---> Big Bang

FF VII:

Aerith - EX Mode: Descendant of the Ancients; EX Burst: The Cry of the Planet ---> Great Gospel | super version of X-Death; only HP damage attack would be White Materia (even though it is to protect the planet - but you need a chance to win with Aerith as well)
Zack - EX Mode: A Hero is born!; EX Burst: Embrace your dreams! ---> Omnislash Version Z.
JENOVA (shapeshifted ancient form with Sephiroth-like clothes) - EX Mode: Reunion!; EX Burst: True Form ---> Planet Crush
Genesis - EX Mode: Degradation; EX Burst: The Gift of the Goddess ---> Purgatory Wave

FF VIII:
Seifer - EX Mode: My romatic Dream!; EX Burst: Finishing Blade
Edea - EX Mode: Liberi Fatali; EX Burst: Dark Soul ---> Wrath of Ice

FF IX:

Vivi - EX Mode: Trance!; EX Burst: Dual Cast (Three different options - which one he uses belongs to your success while using it)
Black Waltz # III - EX Mode: Trance!; EX Burst: This is how you cast a... (Three different options - which one he uses belongs to your success while using it)
Beatrice - EX Mode: Trance!; EX Burst: Legendary Tech ---> Shock

FF X:

Yuna (like Cecil - Summoner and Archer possible) - EX Mode: High Summoner; EX Burst: Master Summon (Three different options - which one he uses belongs to your success while using it)
Seymour - EX Mode: The Unsent; Both hope and existence will end here! ---> Requiem

FF XII:

Ashe - EX Mode: Vengeance or Peace?; EX Burst: Rasler, give me your strength! ---> King's Sword Slash
Vayne - EX Mode: Manufacted Nethicite; EX Burst: History begins anew ---> Tera Flare

FF XIII:

Lightning - EX Mode: I'll fulfill the focus, Serah!; EX Burst: Zantetsuken
Galenth Dysley - EX Mode: I am the ultimate fal'Cie!; EX Burst: Ragnarok