Equestria Girls: Disney Odyssey List of OCs
Note: Like Disney, this list is always changing so expect updates often. 
Credit for the final drafts go to RZG200
Link to Rough Drafts
Link to Final Drafts
Overall Characters

1. Narration by

   1. Mr. V the Mystical Ghost as if voiced by Morgan Freeman

2. In the Book of Disney

   1. Spiritina the Spirit of the Book of Disney as if voiced by Julie Andrews 
   2. And Sheldon the Shapeshifter as if voiced by Martin Short

3. Royal Family of the Kingdom of Scala Ad Caelum

   1. King Simone the King of Scala Ad Caelum as if voiced by James Arnold Taylor
   2. Queen Makenna the Queen of Scala Ad Caelum as if voiced by Maria Canals
   3. Nathaniel the Royal Counsellor as if voiced by Abe Goldfarb
   4. Makayla the Royal Caregiver as if voiced by Melissa Hope
   5. Kazar the Captain of the Guard as if voiced by Isaac C. Singleton Jr.
   6. Mary the Captain's wife as if voiced by Lauren Landa
   7. Grandfather Thomas the Soothsayer as if voiced by Jess Harnell
   8. Grandmother Annemarie the Cook as if voiced by Dixie Carter
   9. And Princess Trinity the Lost Disney Princess as if voiced by Laurie Hymes

4. The 7 Guardians of the Book of Disney

   1. Patrica McSummer the Delzanian Guardian of Peace as if voiced by Patricia Summersett
   2. Winston Oogaboog the Ukakuian Guardian of Wisdom as if voiced by Greg Eagles
   3. Janis Evergleam the Dimpamond Guardian of Joyfulness as if voiced by Andi Gibson
   4. Achilles Windfeather the Livarenian Guardian of Agility as if voiced by Sean Chiplock
   5. Lois Sireanalina the Phiman Guardian of Love as if voiced by Amelia Gotham
   6. Stanley Magmoor the Karudian Guardian of Strength as if voiced by Joe Hernandez
   7. Contessa Thundara the Burosan Guardian of Courage as if voiced by Elizabeth Maxwell
   8. Their loyal mounts will be voiced by Frank Welker
   9. And they are voiced by the cast of Bubble Guppies as children
5.  Villains

6. The Abnorman Family

   1. Joseph Abnorman as if voiced by Drake Bell
   2. Mary Louise Abnorman as if voiced by Marisa Kennedy
   3. Joshua Abnorman as if voiced by Jim Ward
   4. Jebediah Abnorman as if voiced by Jeff Dunham
   5. Winona Abnorman as if voiced by Wanda Sykes
   6. Leena Abnorman as if voiced by Chloe Kim
   7. Johnny Abnorman as if voiced by Bobby Jennings
   8. Sofia Abnorman as if voiced by Kari Wahlgren
   9. And Little Joey Abnorman as if voiced by Kevin Clash

Link to Part 1

You know, I was wondering what happened to the Disney Chronicles OC list on Dino's sight and now I believed the mystery has been solved.

Course I'm just hoping this isn't too similar to Dino's stories, perhaps attempting to do things even he has done.

Still, I am curious to see as to what all these characters have to offer.

I'll add this little note:

If you were going for the highest number of OC guest stars in a single Arc, then that Seventh Arc of stories definitely takes the cake (35 in total, 36 'technically' if we consider the magicians as two characters). Boy if you were just doing the Walt Disney Animation Studios series it wouldn't seem so overwhelming.

But much like Dino it's clear you want to include Pixar and even the Live Action features (Well, most of them anyway). I honestly feel a bit mixed about this.