Ok, so some questions I want to answer before they're asked or even after. This is the chapter I'll answer what I can without spoiling anything.
Age: A few characters have a different age than normal to better suit a few things. They don't change much in the way of story, but this is the differences.
Shadow is 17
Tails is 12
Amy is 14
Shadow's age is just something I decided on myself. Tails was 12 in the Archie Comics just before the whole Genesis Collapse event (In the show, he was like 8). Amy I can't remember from the show, so I just went with 14. I originally intended Tails to be 15, but decided on 12 to keep him a kid.
Maria: Maria is replacing Chris entirely in this show, making her Maria Thoryndike (However you spell that). She's 16. I wanted to use her as let's face it, Shadow is incomplete without Maria and I didn't want to use Chris. My only hope is she won't be irritating.
The other characters are the same age.
I also had the idea to replace Amy with Blaze the Cat, but didn't for two reasons.
1. I'm not comfortable enough with her to stick her in with this series. I am using her in a different fic of mine along with Tails and Knuckles, along with Sonic.
2. Blaze is to much like Shadow. Blaze is quiet, serious, and tends to keep to herself. In other words, She would eventually become a female version of Shadow. Just not as cold.
And one last thing: Robotnik/Eggman. They are the exact same character, just called different from a viewpoint. Tails, Amy, Cream, and Maria know him as Eggman, while Shadow and Knuckles refer to him in a more serious manner, thus calling him his actual name.
I don't intend to do EVERY episode. A lot of the filler I'll skip but I will keep a few that makes sense for development. The baseball episode I'm not going to write. I'll tell you a chapter before-hand how that will go down as I know it involves a Chaos Emerald. So, now you know if I "miss" a chapter.
The "Shadow Saga" I don't know if I will do. I have an idea of how that can play out, but nothing solid just yet. Same with Season 3.
and this is a small bit, but needs to be said. Mobius is the planet everyone lives on in the comics. So all of the Sonic characters (No human ones anyways) are called Mobians.
I hope this cleared a few things up for you guys, and I'll see you next time. If you have anymore questions, PM me. And if you think a character is being annoying or think could be written better, tell me. I want to make a story that people will enjoy after all. I do try to respond to everyone, but sometimes I'm not given the option.