Robots (ロボット, Robotto) are mechanical beings that are either remotely-controlled or have their own artificial intelligence.
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| Name | Affiliation | Status |
| Brave Giant | Child Emperor (Hero Association) | Destroyed |
| Demonic Fan | Unaffiliated | Destroyed |
| Dig Here Woof Woof No. 3 | Child Emperor (Hero Association) | Active |
| G4 | The Organization | Destroyed |
| G5 | The Organization (Monster Association) | Destroyed |
| Gale | Monster Association | Destroyed |
| Hellfire | Monster Association | Destroyed |
| Ribbit Ribbit Mask | Child Emperor (Hero Association) | Active |
| Metal Knight Units | Bofoi (Hero Association) Monster Association |
Destroyed |
| Mini Octotank No. 8 | Child Emperor (Hero Association) | Destroyed |
| Tickle-Tickle Bug 1 | Child Emperor (Hero Association) | Active |
| Underdog Man No. 22 | Child Emperor (Hero Association) | Destroyed |
| Underdog Man No. 23 | Child Emperor (Hero Association) | Merged |
| Underdog Man No. 24 | Child Emperor (Hero Association) | Merged |
| Underdog Man No. 25 | Child Emperor (Hero Association) | Merged |
| Mad Dog Underdog Cerberus | Child Emperor (Hero Association) | Unknown |
| Training Monsterbot (Non-Canon) | Hero Association | Active |
| The following section contains webcomic spoilers. | ||
|---|---|---|
| Mirror | The Organization | Destroyed |
| Body | The Organization | Destroyed |
| Tech | The Organization | Destroyed |
| Ray | The Organization | Destroyed |
| Magnesauza | The Organization | Destroyed |
| Slice | The Organization | Destroyed |
| Eguro | The Organization | Active |
| Shunpo | The Organization | Destroyed |