Ok, so like existing chars from the OG series? I will focus on my Echo Arc projects:

Crying Child, Elizabeth, and Mike: I changed their names to David, Lizzie, and Mike respectively and they are not William's kids. I also kinda made 2 Mikes.

Henry: He has 3 kids, Charlie, Sammy, and Lily

Charlie: I made it so she died a bit older.

William: he has only 1 kid, Michael. This Mike is a lot more like the one from the og series.

Missing Children: I made it so they died a bit earlier in the timeline.

Edwin: I made him die and the events of SOTM happen much later in the timeline

The One You Shouldn't Have Killed: is actually 2 kids, Cassidy obviously and Andrew, a kid from the second MCI aka the DCI.

think that is everything? Unless you wanna hear about how I changed some of the Animatronic chars like Spring Bonnie, RWQFSFASXC, Shadow Freddy, etc.

Ok so here is how I changed all the Animatronics in the Echo Arc games:

Fredbear: Much more plump.

Spring Bonnie: changed his name to Bobun. The only time he is called Spring Bonnie is at the OG Freddy's

BB; he was a balloon seller at Fredbear's Family Diner. Also made it so he appeared in the OG Freddy's

JJ: she was BB's partner, she also has a big coin slot. Also appears in the OG freddy's

Dreadbear: is a Fall Fest attraction and is a Springlock suit.

Carnie: Is also a fall fest attraction but is not a springlock suit.

RWQFSFASXC: changed his name to The Shadow and he is much more powerful and stuff. He was born from Dark Remnant, Remnant infused with agony. Having dark remnant gives a creature some type of power, The Shadow's is tech manipulation. He is also purple now.

Gold Cupcake: was supposed to be a partner to Bobun but was scrapped.

The Puppet: changed her appearance in th Fredbear days and renamed that iteration to the Showtime Puppet. Also appeared in the OG freddy's.

Plushtrap: he is actually a mass produced product called Bontrap. And his nightmare version is called Fingertrap.

Glitchtrap: he based his look off of an old Bobun Mascot Suit.

Nightmare Freddy: made him and the Freddles much more separate.

Shadow Freddy: made from a guy who got Springlocked, his ability is teleportation.

The Mimic: he stays in his 1979 design the entire time, never becoming the SB design.

Unwithereds: called the Vintages in my games, they have slightly tweaked designed and placement in the timeline.

Sparky: made him canon, was gonna be the fourth character but was replaced by Foxy.

Greenlight Freddy: made him canon as Mask Freddy, where did you think the freddy mask came from?

Nightmarionne and Nightmare BB: they just exist normally in the FNAF 4 stand-in and not only as Halloween Edition guys.

Robot Toy and Caterpillar Toy from FNAF 4: made them into threats called Tubi and Carter.

Nightmares: pretty much each one is a stand-in for a character: Nightmare Freddy: David, Nightmare Bonnie: David's "friend", Nightmare Chica: Lizzie. Nightmare Cupcake: Lizzie's Doll, Nightmare Foxy: Mike, Nightmare Fredbear: Fredbear plush, etc.

Fredbear better lay off the burgers or his belly will be the size of Afton's house. XD

@Tricakay27 lmaoo. Yeah I made him as plump (if not plumper) then Breadbear from DSAF.

@Tricakay27 I agree with deadbear being a springlock suit. It has everything a springlock suit would have

Plus in my fnaf fan game, william does murders at another location, where the game is set, to get it closed down so he gets all the business

I forgot to add something. Everything takes place at the Same Freddy’s. The Big Bite, The MCI, BO87, FFPS, it all takes place at the same building but it gets renovated. And somehow nobody cares.

William wasn’t evil until the bite of 83 and cared for his kids but was still hungry for money (I believe CC was the first kid to die in the series)

Shadow Bonnie and shadow Freddy are remnant remains of fazbear employees who got springlocked before the bite of 83 and were the event that caused the crying child to be afraid of fredbears

(excluding the puppet springtrap and funtimes) I believe the reason the animatronics solely attack the night guard because they believe he’s an endo skeleton and don’t believe he’s the killer until they see him in the day shift uniform and it brings back the memories

Michael and the crying child are different people and they are related

Phone Guy is a liar, a cheat, and a scoundrel :)

I forgot to add something. Everything takes place at the Same Freddy’s. The Big Bite, The MCI, BO87, FFPS, it all takes place at the same building but it gets renovated. And somehow nobody cares.

Sounds like something fazbear ent. would do, they would definitely be too lazy to buy new property.