Sonic Adventure 8/Gameplay

Sonic
Sonic's gameplay is copied over from LinkSonic5 Engine 2.

Tails
Tails' gameplay is copied over from LinkSonic5 Engine 2, but he flies for 8 seconds.

Knuckles
Knuckles' gameplay is copied over from LinkSonic5 Engine 2, but he is able to climb walls.

Amy
Amy's gameplay is copied over from Sonic's gameplay, but without Light Dash. For starters, she is able to break through stronger objects (except the ones that only Eggman at 256 kg or heavier can break).

Cream
Cream's gameplay is copied over from Tails' gameplay, but she flies for 4 seconds and throws her chao.

Shadow
Amy's gameplay is copied over from Sonic's gameplay, but without Chaos Spear instead of Bouncing.

Rouge
Rouge's gameplay is copied over from Knuckles' gameplay.

Blaze
Blaze's gameplay is copied over from Sonic Rush.

Silver
Silver's gameplay is based off of Knuckles's LinkSonic5 Engine 2 gameplay.

Omega
Omega's gameplay is copied over from Gamma's gameplay.

Espio
Espio's gameplay is copied over from LinkSonic5 Engine 2, but with Triangle Jump.

Charmy
Charmy's gameplay is copied over from LinkSonic5 Engine 2, but he flies for 16 seconds.

Vector the Crocodile
Vector the Crocodile's gameplay is copied over from Knuckles' gameplay.

Metal Sonic
Metal Sonic's gameplay is copied over from Sonic's gameplay, but with Black Shield and very low traction.

Megaman
Megaman's gameplay is based off of classic Megaman gameplay. Rather than fighting Robot Masters, Megaman is on a mission to kill one of Sonic's crappy friends each mission. He has eight levels, the boss of each one is:
 * Tails
 * Knuckles
 * Amy
 * Cream
 * Shadow
 * Rouge
 * Blaze
 * Silver

Big the Cat
Big the Cat's gameplay is inspired by his Sonic Adventure gameplay, but with many additions. For starters, his rod is now upgradeable with weapons, explosives, and stat upgrades. The rod can even be customized with various looks. Big has much DLC.

Pit
Pit's gameplay is copied over from Kid Icarus: Uprising. Each of his levels involve a flying section and ground section. In each level, a recolor is a boss. The following Sonic recolors are bosses:
 * Sonichu
 * Digit the Hedgehog
 * Blood the Cat
 * Daniel the Cat
 * Lectro the Hedgehog
 * Recolor the Hedgehog
 * Recolor the Echidna
 * Whatever the Heck This Is
 * Pretty Much Everything on Deviantart

Eggman
All of Eggman's levels involve rolling physhics. As Eggman rolls around at the speed of sound, he picks up food objects, which make him fatter, causing him to be able to break through stronger objects and giving him more weight to roll around faster. If he eats healthy food, he slows down and gets skinnier. However, eating too much unhealthy food results in a heart attack. He has a few DLC texture packs, including Gabe Newell and Chris Chan.

Sanic
Sanic's gameplay involves stepping it up and going fast.

Gamma
Gamma's gameplay is copied over from Sonic Adventure 3.

Marine
Marine's gameplay is copied over from Sonic World.

Mighty
Mighty's gameplay is copied over from Sonic World.

Ray
Ray's gameplay is copied over from Sonic World.

Chaos
Chaos's gameplay is copied over from Knuckles' gameplay.

Nack
Nack's gameplay is copied over from Sonic World.

Bean
Bean's gameplay is copied over from Sonic World.

Bark
Bark's gameplay is copied over from Sonic World.

Jet
Jet's gameplay is copied over from Sonic World.

Wave
Wave's gameplay is copied over from Sonic World.

Storm
Storm's gameplay is copied over from Sonic World.

Tikal
Tikal's gameplay is copied over from Knuckles' gameplay.

Tails Doll
Tails Doll's gameplay is copied over from Sonic World.

Metal Knuckles
Metal Knuckles's gameplay is copied over from Sonic World.

Mario
Mario's gameplay is copied over from Super Mario 64 DS.

Luigi
Luigi's gameplay is copied over from Super Mario 64 DS.

Peach
Peach's gameplay is copied over from Super Mario 3D World.

Daisy
Daisy's gameplay is copied over from Peach's gameplay.

Yoshi
Yoshi's gameplay is copied over from Super Mario 64 DS.

Birdo
Yoshi's gameplay is copied over from Mario Party 9.

Toad
Toad's gameplay is copied over from Super Mario 3D World.

Toadette
Toadette's gameplay is copied over from Toad's gameplay.

Toadsworth
Toadsworth's gameplay is copied over from Toad's gameplay.

Wario
Wario's gameplay is copied over from Super Mario 64 DS.

Waluigi
Waluigi's gameplay is copied over from Luigi's gameplay.

Rosalina
Rosalina's gameplay is copied over from Super Mario 3D World.

Donkey Kong
Donkey Kong's gameplay is copied over from Donkey Kong Country Tropical Freeze.

Diddy Kong
Diddy Kong's gameplay is copied over from Donkey Kong Country Tropical Freeze.

King Boo
King Boo's gameplay is

Lakitu
Lakitu's gameplay is

E. Gadd
E. Gadd's gameplay is

Bowser
Bowser's gameplay is

Bowser Jr.
Bowser Jr.'s gameplay is

Kamek
Kamek's gameplay is

Shy Guy
Shy Guy's gameplay is

Mii
Mii's gameplay is