Sonic Adventure 8/DLC

Sonic

 * Classic Sonic
 * Soap Shoes Sonic (aka SA2 Sonic)
 * Riders Sonic
 * Boom Sonic
 * Mario Style Sonic (aka SA7 Sonic)

Tails

 * Classic Tails

Knuckles

 * Classic Knuckles

Amy

 * Classic Amy
 * Amitie Style Amy

Cream

 * Restroom Cream

Shadow

 * Army Shadow

Rouge

 * Halloween Rouge

Blaze

 * Fire Blaze

Silver

 * Neon Silver
 * Armored Silver

Omega

 * Halloween Omega

Espio

 * Ninja Espio

Charmy

 * Goggles Charmy

Vector

 * Businessman Vector

Metal Sonic

 * Metal Sonic 3.0

Pit

 * Dark Pit

Eggman

 * Gabe Newell
 * Chris Chan
 * Peter Griffin
 * Homer Smipson

Sanic

 * Lil' Sanic
 * Bum Sanic

Gamma

 * Beta
 * Delta
 * Epsilon
 * Zeta

Marine

 * Pirate Marine

Mighty

 * Archie Mighty

Ray

 * Archie Ray

Chaos

 * SA2/SB Chaos

Nack

 * Archie Nack

Bean

 * Archie Bean

Bark

 * Archie Bark

Jet

 * Non-Riders Jet

Wave

 * Non-Riders Wave

Storm

 * Non-Riders Storm

Mario

 * Dr. Mario

Luigi

 * Mr. L

Peach

 * Cat Peach

Daisy

 * Cat Daisy

Yoshi

 * Red Yoshi
 * Blue Yoshi
 * Yellow Yoshi
 * Pink Yoshi
 * Light Blue Yoshi
 * Orange Yoshi
 * White Yoshi
 * Black Yoshi

Birdo

 * Red Birdo
 * Green Birdo

Toad

 * Captain Toad

Toadette

 * Captain Toadette

Toadsworth

 * Captain Toadsworth

Wario

 * Sochi Model.

Waluigi

 * Nintendo Waluigi.

Rosalina

 * Cat Rosalina

Donkey Kong

 * Super Kong

Diddy Kong

 * Super Diddy

King Boo

 * Crownless King Boo

Lakitu

 * Red Lakitu

E. Gadd

 * Professor E. Gadd

Bowser

 * Dry Bowser

Bowser Jr.

 * Mario Sports Mix/Sonic Generations Model.

Kamek

 * Green Magikoopa
 * Red Magikoopa
 * Yellow Magikoopa

Shy Guy

 * Green Shy Guy
 * Blue Shy Guy
 * Yellow Shy Guy
 * Pink Shy Guy
 * Light Blue Shy Guy
 * Orange Shy Guy
 * White Shy Guy
 * Black Shy Guy

Mii

 * Cat Peach

Trivia

 * No Fan-Made Characters have DLC
 * Big the Cat has the Most DLC out of any character, while Sonic has the second most