- Shining Abyss
- Shining Elf
- Shining Friendship
- Shocktopus
- Shooting Quasar Dragon
- Shooting Star Dragon
- Silent Magician LV0
- Silent Swordsman LV0
- Silent Swordsman LV3
- Silent Swordsman LV4
- Silent Swordsman LV5
- Silent Swordsman LV6
- Silent Swordsman LV7
- Silver Fang
- Simorgh, Bird of Divinity
- Sinister Serpent
- Sinister Sprocket
- Skelengel
- Skiel A3
- Skiel A5
- Skiel Carrier
- Skiel Carrier 3
- Skiel Carrier 5
- Skiel Guard