Forge Placeholder API
From Pixelmon Wiki
Forge Placeholder API is a Pixelmon sidemod that manages placeholders.
Commands
Note: Command syntax is displayed in the standard Minecraft command format. An explanation of this format can be found here. There is currently only one command to list all active placeholder managers:
/placeholderapi
/papi
/forgeplaceholderapi
/fpapi
Required permission: papi.command