I cannot draw sprites for toffee (though fudge is a possibility) and whilst I am working on trying to create some sprites in the SW style of newer characters in my own time, I've found some people can already without any problem. Unless otherwise mentioned within the comic all accreditations for sprites can be found here. In most instances original poses have been created by me from sheets but here are creators of the others.

Backgrounds
Shadow Of A Hedgehog (http://www.planetdreamcast.com),
Ren's Comic Zone (http://rcz.saphiria.net/)
and Leaf Forest Zone (http://dioxaz.free.fr)

Characters

Shadow The Hedgehog, Sonic The Hedgehog, Knuckles The Echidna by Rittz

Miles 'Tails' Prower by Rittz, edited by Dragon Goddess, (http://www.squeakyzoneproductions.com/yasssc).

Amy Rose by Bendelin (http://www.psyguy.com).

Rouge The Bat ripped by Deekman, original sprites by Sega for Sonic Battle.

Dr.Ivo "Eggman" Robotnik by Cohga.

Vector The Crocodile, Charmy Bee by Zach 'Zin' Furr.

Angelus The Gatekeeper
Original Knuckles Sheet by Rittz, edited for use in Sonic Wrecks by Kevin 'ArchangelUK' Eva.

Alzari the Traveler
Original Bass Sheet ripped by unknown, edited for use in Sonic Wrecks by Kevin 'ArchangelUK' Eva.

Frost the Tiger
Original Treble Sheet ripped by unknown, edited for use in Sonic Wrecks by Kevin 'ArchangelUK' Eva.

Master Hand ripped ripped by Unknown.

Metal Sonic ripped by Greg McNeill, (http://metalla.freewebsitehosting.com) - original sprites by Sega for Sonic CD.

Hawk - Generation 1 (Hawk)
Original Falco Lombardi sprite by Ryle of the Kitsune & Mechachu, Edited for use in Sonic Wrecks by Kevin 'ArchangelUK' Eva.

Hawk - Generation 2 (Hedgehog) created by Blake Draco, aka BlackDragonUK .

The Devil Chao by Scorch The Chao.

Shadow Chao (aka Raven) edited to Shadow by BNR originals by DG.

Dreadknux original design by Svend "Dreadknux" Joscelyne (http://www.sonicstadium.org)
Sprite edited by Kevin 'ArchangelUK' Eva.

Demx, Cloud original designs by Demx (http://www.sonicstyle.org).

MattTY original design by Matt The Yak (Sonic Vegemite)
SW Version created by Kevin 'ArchangelUK' Eva.

Omega, Egg Pawns by Darwin.

Big The Cat by Betatronic (http://www.readyfyght.com).

Super Sonic (G1), Super Shadow (G1) - as featured in #001 & 002 - by G.J.Williams (http://bladeshot.com/rad).

Super Sonic (G2), Super Knuckles - as featured from Ragnarok onwards - by Kevin 'ArchangelUK' Eva.

Cream The Rabbit, Tikal by Cream ( http://www.geocities.com/creamtherabbit).

Chaos Zero ripped by Unknown, original sprites by Sega for Sonic Battle.

Maria (G1) - created by Unknown.

Mario (G2), Silver The Hedgehog (G1), Blaze The Cat - created by Kevin 'ArchangelUK' Eva.

Silver The Hedgehog (G2) created by Blake Draco