How to beat Sebastian in FANTASIAN Neo Dimension

Sebastian in FANTASIAN Neo Dimension is one of the many bosses you can fight to gain a few rewards upon success. This will be the second time you fight the man in the game. This fight is part of a side quest that you'll unlock after meeting the prerequisites. While this boss isn't one of the toughest opponents in the game, his fight does have some elements that can be frustrating to go up against.

Here's a walkthrough describing how to beat Sebastian in FANTASIAN Neo Dimension.

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A walkthrough on how to beat Sebastian in FANTASIAN Neo Dimension

Unlock the quest

The boss fight is a part of the Satisfying Sebastian side quest in the RPG. You'll first need to save Cheryl and Kina from the wormhole, and defend the Vibran Royal Palace from the Mechterian infestation. Talk with Sebastian in FANTASIAN Neo Dimension after completing these objectives; this will trigger the boss fight.

Sebastian

The battle will start as a one-on-one bout (Image via Square Enix || Youtube/donpocke games)

The boss fight will start just like how it did during your first encounter, as a one-on-one battle. After a few turns have passed, Sebastian will reveal the ace up his sleeve — the triplets. He will introduce his twins, making it a three-on-three boss fight after Cheryl and Kina decide to join in for your side. These two will be the only party members you can use in the fight. As such, it's better to have a good arsenal of moves unlocked from their respective growth maps, along with equipping good jewels; it's better to hand some emeralds and rubies to Kina and Cheryl.

The encounter will then transform into a three-on-three fight (Image via Square Enix || Youtube/donpocke games)

The Sebastian trio can apply many status effects on you, including poison, slow, and mist. You should use jewels that defend against these effects. The Sebastians will mostly alternate between Charging and Defensive formations:

Charging Formation	The triplets will charge and hit all the party members with three vital attacks
Defensive Formation	The two other Sebastians will stand in front of the main Sebastian and use Guard, reducing the damage they take and making it impossible to hit the main Sebastian. The main will also cast Desperation.

Use the respite during their Defensive formation to heal your team or apply a debuff to the enemy. You'll be able to damage the Sebastians in this formation only by using party-hitting attacks (such as Cheryl's Knight Impact).

The main Sebastian can also cast Phantom to increase his evasion. When any one of the Sebastians is defeated, the other two will cast Desperation. While this will increase their offense, it will also reduce their defense. This is their last resort for the fight; however, there isn't much left to do. Follow the same pattern as you did before, and you'll ultimately emerge victorious. Cheryl's Absolute Zero can be useful in mopping up the remaining Sebastians here.

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Rewards

Defeating Sebastian in FANTASIAN Neo Dimension rewards you with Ultimate Fists for Zinikr.