Ultimate Weapon | Final Fantasy VII Remake Trophy
Defeat the Pride and Joy Prototype
The Pride and Joy Prototype can be fought in the Shinra Combat Simulator in Chapter 17 towards the end of the "Three-Person Team vs Top Secrets" challenge.
This optional boss is relatively easier than the other summons you will have to fight before it - especially the fight against Bahamut and Ifrit.
The fights during "Three-Person Team vs Top Secrets" challenge
- Shiva
- Fat Chocobo
- Leviathan
- Bahamut and Ifrit
- Pride and Joy Prototype
Pride and Joy Prototype
Large-scale robotic weapon. Development was discontinued because it was deemed too dangerous. Chadley used the project data to recreate a prototype within virtual reality.

Best tip for this fight: Continue avoiding the boss attacks, deal continuous damage to its legs, and keep healing the team.
Reward: Gotterdammerung
Enter battle with a full limit break gauge.
Limit break gauge gradually fills during battle.

Trophy Hunting Wife's Characters and Builds that won the challenge
This especially helped with the Bahamut/Ifrit fight
Cloud
Weapon: Twin Stinger
Accessories: Chain Bangle, Transference Module
Weapon Materia: (Linked) First Strike -- Skill Master; (Linked) Steadfast -- ATB Stagger; HP Up x 2
Armor Materia: (Linked) Elemental -- Fire; (Linked) Healing -- Revival
Aerith
Weapon: Silver Staff
Accessories: Geometric Bracelet, Spectral Cogwheel
Weapon Materia: (Linked) Steadfast -- Fire; (Linked) First Strike -- Skill Master; Magic Up x 2
Armor Materia: (Linked) Elemental -- Ice; Prayer; MP Up
Aerith will take care of Shiva as she will absorb her attacks. Other people have said this is a waste of Elemental Materia, but it worked work well for me.
Start with Arcane Ward as she and Cloud casts Firaga during the Shiva fight
Barret
Weapon: EKG Cannon
Accessories: Rune armlet, Fury Ring
Weapon Materia: (Linked) MP Up -- ATB Assist; (Linked) MP Up -- HP Up; (Linked) Barrier -- Magnify
Armor Materia: (Linked) Healing -- Revival; ATB Stagger