Prompto (boss)

The player can train with Ignis on campsites. New training levels are unlocked as the player levels up, and the Final Trial is open in Chapter 15. Completing a training session earns 5 AP. Ignis and the other party members do not appear in the bestiary, but the player can scan their HP and weaknesses/resistances in the Wait Mode.

The player can use the Ring of the Lucii against the bros in Chapter 15. The player can use Armiger, but there are no point-warp spots on havens and summons never trigger. The player can train in any time of day and in any weather. The training partners' stats and gear are not the same as when they are party members, and their food buffs don't carry over to their training partner forms either. The player can use Elemancy, but the training partners never do. Training partners don't yield item drops, but completing the last sessions yields accessory rewards.

Battle
Training is available on havens on the continent of Lucis when the required party members are present. When Gladiolus is away in chapter 7, the player can only train with Aranea while she is a guest.

The training ends when Noctis is knocked to Danger state and Ignis or another training partner comes with the rescue animation. The player needs to quickly heal if they don't want to end the training yet.

Ignis uses same battle maneuvers as when he is AI-controlled as a member of the player's party. He doesn't use maneuvers from his player-controlled state, as that was added to the game later. Ignis uses items to heal himself and those he fights alongside. He attacks fast with his daggers, which can be phased through with the defense button. As havens don't have point-warp points, there is no fast way to replenish MP outside of using items.

Final Trial
Ignis resists all elements, is immune to Holy, and resists most weapons, taking normal damage from daggers and firearms and being weak to shields.

The player should defeat Ignis first as he heals the others. The player can then defeat either Prompto or Gladiolus. Warp-striking Ignis with his weapon weakness (shield—especially point blank critical) defeats him quickly.