Sab
Sally Acorn
Sammy Badger
Sandopolis Zone
The Sapphire
Savage Skunk
School for Gifted Monkeys
Scorchio Zone
The Schimitar Brothers
Master Scholar
Scrap Brain Zone
Scratchy
The Secret Zone
Robotnik’s Seismatron
Drakon Sentinels
Serpentus
Set
The Seven Badniks
The Shadow World
Shaman
Shanazar
Sharka Kahn
Shayde
Sheriff of Backwater Town
Shiriob
Shortfuse The Cybernik
Shorty The Squirrel
Lord Sidewinder
Silver Sonic
Simpson
Skegpool Beach
The Skeleton Crew
Agent Skog
Skoorg
Skull Rock
Sky Sanctuary Zone
Sleek The Panther
Slimy
Smallzone
Smart Missile
Snooty and Sneaky
Snowcap Mountain Zone
Snow Monkey
The Snownik
Society Max
Sol
Sonic's Secret Underground Base
The Sonic Speed Treadmill
Sonic The Hedgehog
Doctor Sorders
South Island
The Space Race
Special Badnik Service (SBS)
The Special Zone
The Spice Maidens
Splats Badnik
Squall
Robotnik's Squeeze Tag Machine
Starposts
The Statue Of Freedom
Steam Powered Machine
Stephen Squealbird
Steve Owl
Stone Tower Zone
Mister Stripes The Badger
Stripes Junior The Badger
Doctor Sun
Sunshine Valley Zone
Sun Valley Zone
Robotnik's Super Armour
Robotnik's Super Computer
Super Sonic
The Superzone
Sydney Bland
Sython