>>718594394
>Brighty Sunhorn
Isn't she the iguana who was working with Fang in a recent game?

>Dark Gaia
He's the villain from Unleashed.

>Mecha Sonic Mk II
I'm pretty sure that's what Metal Sonic becomes in Sonic Heroes.

>Marine the Raccoon
The name sounds familiar.

So that leaves 1 more. Here's my guess.
>Chao King
I may be making this up but I have an image in my mind of a black Chao with a toothy grin wearing a crown.