Fun Glitch -- Play as Reks - Found by ejh1990
It is possible to play as Reks simply by renaming a single file -- the autosave file. Here's how it works.

1.Begin a new game and play through until you gain control of Vaan.
2.Wait a few seconds until the autosave has completed.
3.Quit the game before killing the rats and leaving the waterway.
4.Navigate to %USERPROFILE%\Documents\My Games\FINAL FANTASY XII THE ZODIAC AGE
5.Find the file inside the folder called FFXII_000 -- that's the autosave file.
6.Rename the file so as to change the 000 to any number between 001 and 199 that is a free save slot. (Don't go overwriting your actual saves! That wouldn't be good).
7.Reload the game using the save slot based on the number you used in the step above (i.e. don't load the actual autosave).

For some reason, loading this save file messes with the scripts that switch out Reks for Vaan meaning you get to keep Reks (although Vaan's model is used in towns). y has no Animations for unar

Rek's Equipment and Jobs can be Modified Now -- Cheat Table Made by Tohru Adachi
Since i found out that It's Impossible to get past the Nalbina Dungeon part where you had to fight unarmed with Reks because he simply has no Animations for unarmed combat, 
i decided to delve deep into Cheat Engine for the first time to see if i could find his Addresses and Values for his Equipment, and Jobs. I Worked Hard and i eventually found them because
of my Love for this game, and for Reks, and Yuri Lowenthal. Below are the Steps:

1.Load up Cheat Engine 6.7
2.Open The Final Fantasy The Zodiac Age Exe with it
3.Run Game
4.Go to Rek's Addresses down at the bottom
5.Right Click The Addresses you want to change, Health, Weapons, Jobs, etc.
6.Click Browse Memory
7.Open up Rek's Addresses and Value Txt Docuement in Folder
8.Paste a code to it's respective Address.
9.View the other character's Addresses for more codes on other weapons, Jobs, etc.
10. Go See the Changes 

Rek's Addresses and Values:

Rek's Addresses and Values For Cheat Engine:

Rek's Weapon - Blood Sword - Code - 48C0 4910
Rek's Shield - Genji Shield - Code - 4AD5 4B10
Rek's Helm - Genji Helm - Code - 4C15 4D11
Rek's Armor - Genji Armor - Code - 4E51 4F11
Rek's Accessory - Ribbon - Code -5081 5111 
Rek's First Job - Knight - Code - 4B4
Rek's Second Job - Black Mage - Code - 4C9
Rek's Primary Job - Knight - Code - 4D9


  
        Enjoy!