Verified answer

they for the most part are unlimited.

Level 1 Key Sphere

Usage- unlocks level 1 lock

Steal- N/A

S. Rare- Earth Eater (Monster Arena)

Drop- Chocobo Eater (Mi'ihen Highroad)

- Master Coerl (Omega Ruins)

D. Rare- Sand Worm (Sanubia Desert)

- Puroboros (Omega Ruins)

Bribe- Imp (Cavern of the Stolen Fayth, Mt. Gagazet)

Level 2 Key Sphere

Usage- unlocks level 2 lock

- 1 for Piercing in weapon

- 2 to teach an aeon Armor Break

Steal- N/A

S. Rare- Catastrophe (Monster Arena)

Drop- Spherimorph (Macalania Spring)

- Seymour Natus (Great Bridge)

- Defender X (North of the Calm Lands)

- Defender Z (Yevon Dome, Omega Ruins)

D. Rare- Tonberry (Cavern of the Stolen Fayth)

- Varuna (Inside Sin, Omega Ruins)

Bribe- Behemoth (Mt. Gagazet, Zanarkand Ruins)

Level 3 Key Sphere

Usage- unlocks level 3 lock

Steal- Biran Ronso (Mt. Gagazet)

- Yenke Ronso (Mt. Gagazet)

S. Rare- Ultima Buster (Monster Arena)

Drop- Lady Yunalesca (Yevon Dome)

- Sin's Right Fin (Airship)

- Sin (Airship)

- Seymour Omnis (End of the Sea of Sorrow)

- Ultima Weapon (Omega Ruins)

D. Rare- Defender Z (Yevon Dome, Omega Ruins)

- Behemoth King (Inside Sin)

- Demonolith (Inside Sin, Omega Ruins)

- Machea (Omega Ruins)

Bribe- Demonolith (Inside Sin, Omega Ruins)

Level 4 Key Sphere

Usage- unlocks level 4 lock

Steal- Nemesis (Monster Arena)

S. Rare- N/A

Drop- Seymour Flux (Mt. Gagazet)

- Spectral Keeper (Yevon Dome)

- Omega Weapon (Omega Ruins)

D. Rare- Land Worm (Inside Sin)

Bribe- Chimera Brain (Calm Lands)

And here are the Bribe amounts

Monster: Imp

Bribe: Level 1 Key Sphere x4 for 17,600

Item: Level 2 Key Sphere

Monster: Behemoth - Level 2 Key Sphere x30 for 460,000 gil

Item: Level 3 Key Sphere

Monster: Demonolith - Level 3 Key Sphere x40 for 900,000 gil

Item: Level 4 Key Sphere

Monster: Chimera Brain - Level 4 Key Sphere x2 for 196,000 gil

Ffx Sphere Grid

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RE:

FF10. sphere grid. level 1-4 key locks. Please see details.?

is there an unlimited supply of level 1,2,3 or 4 key locks on ff10 for the sphere grid. Say by stealing by monsters, or by finding them somewhere, or is there a set amount?

P.S.

if there is a set amount, can you also (if possible) name the locations of these.