| Name | Attribute | Level | Type |
|---|---|---|---|
| Silent Brambleburg Guard | - | 1 | General |
| Silk Merchant | - | 1 | General |
| Silver Chest | 93 | General Monster | |
| Silver Chest | 93 | General Monster | |
| Silver Fleatle | - | 1 | General |
| Silver Fleatle | 36 | General Monster | |
| Silver Guardian Barak | 76 | Elite Monster | |
| Silver Mech | 79 | Elite Monster | |
| Silver Mech | 79 | Elite Monster | |
| Silver Medal Telepathic Practitioner Jimmy | - | 1 | General |
| Sim | 145 | Elite Monster | |
| Simba | - | 1 | General |
| Simeon | - | 1 | General |
| Simeon | - | 1 | General |
| Simoli | - | 1 | General |
| Simple Barricade | - | 1 | General |
| Sinking Sun Imma | 115 | World Boss | |
| Siren Clarios | 75 | Elite Monster | |
| Siren Clarios | 75 | Elite Monster | |
| Skeletal Archer | 62 | General Monster | |
| Skeletal Archer | 62 | General Monster | |
| Skeptic Furval Omo | - | 1 | General |
| Skull | - | 20 | General Monster |
| Sky Blue Bulbird | 3 | General Monster | |
| Sky Stage | - | 100 | General Monster |
| Sky Strike | - | 1 | General |
| Slaughter Scorpion | - | 5 | General |
| Sled | - | 1 | Interactive |
| Sledgeblow Niclas | 60 | Boss Monster | |
| Sledgeblow Niclas | - | 1 | General |
| Sledgeblow Niclas | 80 | Boss Monster | |
| Sledgeblow Niclas | 60 | Boss Monster | |
| Sledgeblow Niclas | 70 | Boss Monster | |
| Sledgeblow Niclas | 80 | Boss Monster | |
| Sledgeblow Niclas | - | 1 | General |
| Sledgeblow Niclas | 90 | Boss Monster | |
| Sledgeblow Niclas | 99 | Boss Monster | |
| Sledgeblow Niclas | 70 | Boss Monster | |
| Sledgeblow Niclas | 90 | Boss Monster | |
| Sledgeblow Niclas | 99 | Boss Monster | |
| Sleeping Black Snake | - | 1 | General |
| Sleeping Bulbird Adventurer Tootsie | - | 1 | General |
| Sleeping Orcan Guard | - | 1 | Interactive |
| Sleeping Pirate | - | 1 | Interactive |
| Slime Devourer | 55 | General Monster | |
| Slime Fragrance Powder | - | 1 | Interactive |
| Slimebody | 18 | General Monster | |
| Slimebody | 18 | General Monster | |
| Slimebody | 48 | General Monster | |
| Slimebody | 48 | General Monster |