Worked out by reading the registry of every Minecraft build Mojang has published, in release order.
| Version | Date | What the files show |
|---|
| before 18w50a | — | Already in the game when Mojang’s data generator first shipped, in 18w50a (12 December 2018). The files do not say which earlier version added it. |
| 22w44a | 2 November 2022 | Display name changed from “Minecart with Spawner” to “Minecart with Monster Spawner”. |
| 1.19.3 | 7 December 2022 | Display name changed from “Minecart with Spawner” to “Minecart with Monster Spawner”. |
