Mega Mirages are the largest Mirages in World of Final Fantasy. Listed as the size "XL", they cannot be added to the normal stacks for battles. They are instead summoned via the battle menu, by selecting the "Mega Mirages" command.
Mega Mirages are summoned by both Lann and Reynn, and doing so requires AP from both their stacks. If either sibling is not present, they cannot be summoned. Once summoned, a Mega Mirage temporarily takes the place of the player's stacks as they fight for them. Attacking requires AP, and is not replenished when their turn comes up. If a Mega Mirage's HP or AP is depleted, they automatically disappear and cannot be summoned in the same battle again. The player's stacks then return to the battle. The player may also dismiss the Mega Mirage at any time by selecting the "Release" command.
As Mega Mirages cannot be added to the player's stacks, they are not given a weight stat and their stats cannot be seen from the Stack Setup menu (they can still viewed from the Prism Case, however). Because of this, Mega Mirages receive only the flat 8% of EXP earned in battles.
In the Maxima version, equipping Champion Jewels for either Lann or Reynn has a drawback of preventing them from summoning Mega Mirages in battle.
List of Mega Mirages
| Mirage | AP Required | Obtain | Memento required for transfiguration |
|---|---|---|---|
 Iron Giant |
12 | Imprism the Iron Giant at Big Bridge - Secret Segment. If defeated (but not imprismed), unlock Iron Giant transfiguration from a Mythril Giant's Mirage Board with respective memento. | Iron Giant |
 Cerberus |
12 | Imprism the Cerberus at The Dragon Scars - Secret Scar. If defeated (but not imprismed), unlock Cerberus transfiguration from a Fenrir's Mirage Board with respective memento. | Cerberus |
 Behemonster |
14 | Imprism a Behemonster in Castle Exnine or EX Dungeon C, or unlock Behemonster transfiguration from a Behemoth's Mirage Board by bringing its LV to 40 or higher. | — |
 Bismarck |
14 | Clear intervention quest - "Finger-Whistle Crisis", then unlock Bismarck transfiguration from a Mega Sharqual's Mirage Board with respective memento. Alternatively, after acquiring respective memento, imprism Bismarck at The Coliseum in "Sovereign of the Sea" match. | Bismarck |
 Leviathan |
12 | Obtain Leviathan Memento by clearing intervention quest - "Ancestral Acrimony", then unlock Leviathan transfiguration from a Sea Snake's Mirage Board with memento. | Leviathan |
 Adamantoise |
12 | Clear intervention quest - "Treasure Island, Ahoy!", then unlock Adamantoise transfiguration from a Minimantoise's Mirage Board with respective memento. Alternatively, after acquiring respective memento, imprism Adamantoise in The Low Seas, The Coliseum in "Preying Mantoise" match, or EX Dungeon A. | Adamantoise |
 Diabolos |
12 | Obtain Diabolos Memento by clearing intervention quest - "When the Past Still Haunts", then unlock Diabolos transfiguration from an Imp's Mirage Board with memento. | Diabolos |
 Odin |
18 | Obtain Odin Memento by clearing intervention quest - "A Clash of Swords", then unlock Odin transfiguration from a Unicorn's Mirage Board with memento. | Odin |
 Ultima Weapon |
24 | Clear intervention quest - "A Sad Spiral", then imprism Ultima Weapon at The Coliseum in "The Ultimate Weapon" match. | — |
 XG |
24 | Defeat XG in EX Dungeon Z; is automatically recruited to the player's party. | — |
 Omega God |
24 | Clear DLC intervention quest - "A Bridge's Woes"; is automatically recruited to the player's party. | — |
| Leviathan★ |
14 | Clear intervention quest - "Ancestral Acrimony"; is automatically recruited to the player's party. | — |
 Bahamut★ |
20 | Clear intervention quest - "The Demon Dyad: Revealed"; is automatically recruited to the player's party. | — |
| Odin★ |
18 | Clear intervention quest - "A Clash of Swords"; is automatically recruited to the player's party. | — |
| Diabolos★ |
12 | Clear intervention quest - "When the Past Still Haunts"; is automatically recruited to the player's party. | — |
Musical themes
"Mega Mirage Melody" is the theme that plays when summoning a Mega Mirage to battle.
Behind the scenes
When summoning a Mega Mirage, Lann and Reynn transform into their Lilikin forms even if one of them was still in Jiant form. While Mega Mirages have victory animations, there is no such selection in the Mirage Manual.