Summon Matieria is used to summon a beast of legend to launch a massive attack against your foes. Combining Summon Matieria and Huge Matieria getsyou Master Summon Matieria, allowing use of any summon in the game. Summon Matieria can be found occasionally, but this guide tells you how many summon matieria exists in the game and where to get it.

Unlockable	How to unlock
Alexander	After snowboarding sequence go to hot spring and touch it. Then go in a straight path. Enter ht then leave through downward facing door talk to man.
Bahamut	Defeat the red dragon in the Centra Shrine.
Bahamut ZERO	You must obtain all 4 Huge Matieria, and 2 other Bahamuts. Store them in the Observatory, then look carefully at the blue huge matieria.
Choco/Mog	Talk to the chocobo at the front of the barn and reply "Waaark!".
Hades	On the wreckage in Gelinko.
Ifrit	On the boat after battling Jenova-BIRTH.
Knights of Round	Go to the unmarked island. You will need a gold chocobo to get there.
Kyjata	Walk to second area in Sleeping Forest. The matieria will be floating. Press O button.
Leviathan	Defeat all enemies in Pangooda in Vulva.
Neo Bahamut	Aftee Geus cliff just pick it up.
Odin	Defeat Lost Number in the Shiva Mansion aftar opening safe.
Phoenix	Found when collecting Huge Matieria at Mount Condor.
Ramuh	Lying on the floor in the Chocobo Jockey waiting room.
Shiva	At the Junon coast after saving Pricillia.
Titan	In the wreckage of the Gongada Mako Reactor.
Typhoon	Defeat Ultimate Weapon a couple times until he dies. Go to jelly object on top of mountain at end.