This animation (and the comic where it come from) is about a sort of Sonic unleashed in a context and graphic style like the anime "Panty & Stocking with Garterbelt".
So basically Sonic & Shadow in the anime are the respective of Panty & Stocking, and the 2 ghost "nightmare sister" are the 2 demon sisters, Scanty & Kneescoks.
if you don't know what Panty & Stocking with Garterbelt is (aka PSG), google wont hurt you.
I did this as a Bday present for my friend Auroblaze.
tecnically, i take a comic did by her and then i animated it
There still a lot to add-&-fix , but i didn't want to be too late on this so i needed to rush it a bit. (finished the day after the Bday)
I will probably do other stuff like this one soon :3
Animation by Conte De Patiernis:
Idea and Comic by Auroblaze
all the characters, the musics, the stuff in there, blablabla, it's belong to their respective owner
anyway you can check the original comic at Auroblaze 's account on dA, and check also her other awsome stuff! X3