Engine 023 Booster

Engine 023 Booster is a special postgame fight with Booster, and he can be found at the top of Booster Tower. Thankfully, you can warp straight there from the map! Defeating him will reward you with Geno's strongest weapon, the Stella 023.

This encounter seems really tough at first, but if you follow a few rules you can take him out pretty easily. Before the fight, put Mallow and the attacker with the highest speed in your party. The Zoom Shoes or Jinx Belt can really help boost your speed stat. Also, equipping the Flower Ring on Mallow will cut FP use in half, which will be really helpful as you’ll need him to cast spells. Then go ahead and start the battle.

First - always attack Booster when he starts working. If you let him finish without interruption, he’ll instantly wipe every party member on the field.

Thankfully, a simple attack will break his concentration. When he’s not working, cast Snowy with Mallow to take out the mobs who are all weak to ice. When these guys are alive they’ll hit you with strong AOE attacks and buff Booster to make him work faster.

Once all the Snifsters are dead, it’s pretty simple– just keep attacking Booster until you take him out, and receive Geno’s best weapon, the Stella 023.