Checkmate (Earth-Zero) has appeared 5 times in indexed Justice League stories.
| Appeared As | Appeared In | Notes | Portrayed by | |
|---|---|---|---|---|
| 6100 | Other Characters | Justice League: Generation Lost #1 (Early July 2010) | An unnamed Checkmate agent who delivers a message from Fire to Ice. | N/A |
| 6130 | Other Characters | Justice League: Generation Lost #3 (Early August 2010) | Castle security, reacting to Fire's approach and trying to prevent her from gaining access. | N/A |
| 6170 | Other Characters | Justice League: Generation Lost #7 (Early October 2010) | Castle security, scrambling due to Captain Atom's attack. | N/A |
| 6180 | Other Characters | Justice League: Generation Lost #8 (Late October 2010) | Castle security, scrambling due to Captain Atom's attack. | N/A |
| 6200 | Other Characters | Justice League: Generation Lost #10 (Late November 2010) | Skeets reveals that Maxwell Lord reactivated four Checkmate sleeper cells upon the day of his resurrection. Each of the four-cells was based in a robotic laboratory. | N/A |