- Steel Ogre Grotto #1
- Stinging Jellyfish
- Stinging Swordsman
- Stone Statue of the Aztecs
- Storm Caller
- Stray Cat
- Stray Cat Girl
- Strike Ninja
- Strong Shovel Excavator
- Strong Wind Dragon
- Stronghold Guardian
- Stygian Security
- Stygian Sergeants
- Stygian Street Patrol
- Submarineroid
- Submersible Carrier Aero Shark
- Suijin
- Summon Reactor•SK
- Summoned Skull
- Sumo King Dog
- Sun Dragon Inti
- Sunlight Unicorn
- Sunny Pixie
- Super Conductor Tyranno