Sonic the Hedgehog Set

[Jonnnn]

Leaders:
Doctor Robotnik
Doctor Fukurokov
G.U.N.

Heroes:
Sonic
Tails
Knuckles
Amy
Mecha Sonic
Silver Sonic
Metal Sonic
Amy Rose
Robo Eggman
Espio the Charmeleon
Vector the Crocodile
Charmy Bee
Bark the Polarbear
Bean the Dynamite
Big the Cat
Froggy
Shadow the Hedgehog
Rouge the Bat
King Boom Boo
Egg Golem
Maria Robotnik MARIAAAAAAAAAA!!!
Gerald Robotnik
Biolizard
Cream the Rabbit
Cheese the Chao
Silver the Hedgehog (Add to this if you know about the very recent games, this is the only character I know of)

Creatures:
Chao
E-Series Robots (Omega, Delta, etc.)
Badniks
Animal Friends
Flickies (Great game)
Kukku Army

Buildings:
Stages

Items:
Rings
Chaos Emerald
Moniter
Super Sneakers
Sheild
Lamp Post
Spikes
Emblem

I'll add more to the items later.  

[nitnit]

Who is G.U.N ? Do you mean the president? Also make sure biolizard can transform into final hazard.

Also add in:

Black Doom (leader)
all the black doom minions (creatures)
all the different robotnik robots (creatures)