every Summon EVER!!!

[Kawaii Ryûkishi]

Meteor is a spell in FFVII, just like it is in FFII, FFIV, FFV, FFVI, and prettymuch every other game. Holy is a spell, too. It's just that, in FFVII, they were directly tied into the plot. Meteor is even called the "Ultimate Destructive [read: Black] Magic" in the game. So, no, Sephiroth didn't summon Meteor, he cast Meteor.

[Doomgaze]

Tidus is kind of an Aeon, isn't he?

You had your chance to play it, spoiler-time's over.

[Kawaii Ryûkishi]

Your mom is an Aeon, sir.

[udsuna]

I don't know if Legend of Dragoon quite fits in here, but there were some later-level spells that allowed the "summoning" of dragons to cast whatever their specialty spell trick was. I only remember the white dragon and its very impressive healing ability.

[Sefie1999AD]

Your mom is an Aeon, sir.

ROFL!

Kingdom Hearts: Chain of Memories also has summons. It has those that DJzen listed, plus a few others. Practically, you also summon your party members (Donald, Goofy, Ariel, Aladdin, Peter Pan, Jack Skellington, Beast and King Mickey), but if only "real" summons count, then (SPOILER)Cloud Strife is also a summon. Sora asks him if he wants to join your party. He says he's not interested, then he becomes your summoned beast/character.

[Memorylight]

How do you get the Chain of Memories?

[DJZen]

I don't know if Legend of Dragoon quite fits in here, but there were some later-level spells that allowed the "summoning" of dragons to cast whatever their specialty spell trick was. I only remember the white dragon and its very impressive healing ability.

Legend of Dragoon isn't a Square game. It's a Sony game IIRC.

[Masamune·1600]

There are exceptions. In FFVI, Jihad's attacks does damage to the party as well as the enemy. Plus, if a technique has a huge show-stealing magical creature come down and use some devastating attack before disappearing whence it came, and especially if the name of the technique is the name of this very creature, it counts as a summoning.

Well, on a technicality, the original question asked for summons, as opposed to every instance of summoning in the series. If that were the case, you would have to include, for example, the Pooder and Bad Rap Samples Hojo calls upon in FFVII, or when the first Black Waltz brings up the Sealion in FFIX. That last example clearly demonstrates summoning, yet I would not classify Sealion as a summon. Summons are essentially a class unto themselves, and, except for a few rare cases, are accessible to the party. The exceptions, of course, would be for situations like Griever, clearly a GF despite the fact that the party can never use him.

I do like your suggestion for the summon NPC's in FFIV and VI; they would match my definition.

In response to your Jihad example, allow me to point out that FFVI was absolutely awash with instances of "unfocused damage." Merton, Quake, WWind....we all know. Given the prominence of that style of attack in that game, it makes sense that they would have had an unfocused Esper.

However, FFT is a tactical game, where you have take movement of a character into attack range into consideration. Much of the usefulness of summons in FFT is derived from the fact that this is not a concern; you can't slaughter your own characters with Bahamut or Odin or Zodiac. The fact that Midgar Swarm doesn't follow this pattern classifies it as a spell, which I always liked to think was somehow related to Bio in that game.

My second point, however, clearly dismisses Midgar Swarm as a summon. If it were, any summoner who survived the attack would have learned it. As such, Midgar Swarm is a best an instance of a summoning, rather than a legitimate "summon," and probably not even that.

[Kawaii Ryûkishi]

The map zooms out, the camera drifts upwards, we see the Midgard Sorm blur and dart around as the map spins and receives the damage. Just like every other summon in the game.

[DJZen]

Plus which it was a summon in FFVI anyway. I'm definitely siding with Kishi on this.

[Del Murder]

Shocker.

What did 'Cait Sith' translate to in FFVI?

Also: Was Eiko's Mog considered a summon? 'Gaurdian Mog' or something like that.

[Sepho]

Well, Mog = Madeen, which is already covered as an Eidolon.
The "Guardian Mog" was a support ability that Eiko could equip.

[Del Murder]

Did it do anything?

[Sepho]

"Mog protects with unseen forces", whatever that means.

I read what it did one time, but I presently forget.

[Kawaii Ryûkishi]

What did 'Cait Sith' translate to in FFVI?

Woolsey called it "Stray."