PlaceHolderAPI

You can use PvPManager placeholders in other plugins since it now hooks into PlaceholderAPI

If you have both PvPManager and PlaceholderAPI in your server you should be able to see a list of all available placeholders by simply running the command /papi info pvpmanager

In any case, below is a list of all placeholders for easier copy pasting.
The third column indicates placeholders exclusive to the premium version.

Placeholder	Description	Premium
%pvpmanager_in_combat%	True if the player is in combat
%pvpmanager_combat_timeleft%	Seconds left until out of combat
%pvpmanager_pvp_status%	True if pvp enabled, false otherwise
%pvpmanager_pvp_status_prefix%	PvP On prefix or PvP Off prefix depending on PvP status	X
%pvpmanager_pvp_command_timeleft%	Seconds until player can use /pvp again
%pvpmanager_is_newbie%	True if the player has newbie protection
%pvpmanager_newbie_timeleft%	Seconds until newbie protection expires
%pvpmanager_has_override%	True if the player has override enabled
%pvpmanager_has_respawn_prot%	True if the player has respawn protection
%pvpmanager_has_teleport_prot%	True if the player has teleport protection	X
%pvpmanager_current_enemy%	Shows the last attacker of the player