Chadley will be found on all the "city stops" throughout the game: Chapter 3 (Sector 7 Slums), Chapter 8 (Sector 5 Slums), Chapter 9 (Wall Market), Chapter 14 (Sector 5 Slums), Chapter 16 (in front of Shinra VR Simulator) and when you replay Chapter 17 (Hojo's Lab). There's a total of 20 battle intel reports. Combat Simulations are affected by difficulty, thus playing them on Easy will lower the difficulty significantly.
Below is a list of all battle intel reports and how to get them:
1. Monster Bio Pt. 1
Assess 2 enemy types. You will obtain Assess materia, equip it and use it (Cross > Abilities > Assess with 1 ATB bar) on 2 enemies to find out their weakness.
2. Magic Elements Pt. 1
Hit enemies vulnerable to the 3 magic elements: fire, ice, and lightning (1 time per element). You will need to obtain each element materia, equip it and use it on enemies vulnerable to that element (use Assess to know).
3. The Stagger Effect Pt. 1
Use unique abilities (Triangle abilities) on staggered enemies and charge ATB gauge 10 times. When an enemy is staggered, use Triangle skills to charge the ATB gauge bar (Cloud's Operator Mode, Tifa's Whirling Uppercut or Barrett's Overcharge).
4. The Stagger Effect Pt. 2
Stagger 15 enemy types. You will complete this naturally as you progress.
5. Combat Simulation: Shiva
Defeat Shiva to obtain the Shiva Summon Materia.
6. Monster Bio Pt. 2
Assess 10 enemy types, same as Monster Bio Pt. 1
7. Magic Elements Pt. 2
Exploit the weaknesses of 15 enemy types. This is the same as 'Magic Elements Pt. 1' but it's not restricted to 1 time per element, but rather 1 time per enemy type. Help yourself with Assess to know the weakness to elements.
8. The Manipulation Technique
Defeat 2 or more enemies with a single attack. Will complete naturally as you progress.
9. Monster Variants Pt. 1
Defeat monsters of 3 unique varieties. Will complete naturally as you progress.
10. Combat Simulation: Fat Chocobo
Defeat Fat Chocobo to obtain the Fat Chocobo Summon Materia. To unlock Fat Chocobo, you'll need to complete battle intel reports 1 - 9. You will be coming back to this to do the stagger trophy/intel report.
11. Monster Bio Pt. 3
Assess 20 enemy types, same as Monster Bio Pt. 1 & Pt. 2
12. The Stagger Effect Pt. 3
Increase stagger damage bonus to 200%. See Bronze Staggering Feat for more information. If you're earlier in to the game and already want to complete this, simply load up the Fat Chocobo again and once staggered hit it with Tifa's Triangle skill.
13. Refocus Analysis
Refocus is a limit break equipped by Aerith by default. Simply charge the Limit Break bar and use it twice.
14. The Stagger Effect Pt. 4
Stagger 40 enemy types. Will complete naturally as you progress.
15. Combat Simulation: Leviathan
Defeat Leviathan to obtain Leviathan Summon Materia. To unlock Leviathan, you'll need to complete battle intel reports 1 - 14. If you're struggling with Tidal Wave (it's one-shotting you), know that you can use Manaward (level 2 of Barrier Materia) to survive it.
16. Monster Bio Pt. 4
Assess 30 enemy types, same as Monster Bio Pt. 1 & Pt. 2 & Pt 3. Simply assess everything you come across. If you're having trouble finding enemy types, you can participate in some of the optional fights at the Corneo Colosseum in Chapter 14 and Assess all of the different enemies you fight. After completing this, you can visit Chadley and start working on the Silver Master of Mimicry trophy.
17. Weapon Abilities
Acquire all 16 weapon abilities. Well, 16 weapon abilities aren't all of them (there's a total of 24), but it will be enough to complete this intel report. Simply bring the proficiency of the weapons up to 100% to unlock their skills (see Silver Weapons Expert for more information).
18. MP Consumption
Master all 12 types of magic materia. Level up to the maximum the magic materia (help yourself linking it to AP Up Materia if necessary), although by the end of the game you will have most leveled up to the max, and with the Hard playthrough it should be enough. The optional fights at the Corneo Colosseum in Chapter 14 is a great place to level these up. This are the 12 materias:
Healing Materia
Cleansing Materia
Revival Materia
Fire Materia
Ice Materia
Lightning Materia
Wind Materia
Poison Materia
Barrier Materia
Binding Materia
Subversion Materia
Time Materia
19. Monster Variants Pt. 2
Defeat monsters of 10 unique varieties. This should be completed naturally as you progress.
20. Combat Simulation: Bahamut
Defeat Bahamut to obtain Bahamut Summon Materia. You'll unlock Bahamut after completing battle intel reports 1 - 19. This boss can be quite hard, so if you're struggling it's recommended to attempt this fight on easy difficulty.
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