Player vs. Player

In Pokémon Mystery Universe there exists mechanics and locations around Player versus Player combat.

Moral
Usually, players aren't able to deal damage to each other (as most non-dungeon maps are Safe Zones). If they generally can or cannot depends on the moral of the map, indicated by the color of the map name. There are four total morals a map can have:
 * None - Black name, harmful moves can hit other players.
 * Safe Zone - White name, harmful moves can't hit other players.
 * No Death Penalty - Red name, harmful moves can hit other players.
 * House - Yellow name, harmful moves can't hit other players.

Arenas
Arenas are places that are mapped solely for players to fight among each other. There is an arena in every region. The outside field of an arena is safe, players can only battle each other when in the arena itself. If the player defeats another player here nothing is lost or gained, and the player that fainted can switch Pokémon or give up and be warped outside of the arena.

Dungeons
Due to dungeons using the "None" moral, normally players are able to harm each other, although the only way to see other players in a dungeon is to be in a party or in the same guild, in which cases you are allied. However, players are able to damage members of a different guild in dungeons. Otherwise, damaging other players in dungeons is exclusive to using moves when in the Shocked state, triggered by a Shocker Trap. Being killed by a player is the same as being killed by an NPC, including the item loss if one decides to give up.

Stadium
The stadium is one of the rooms in Delite Plaza. Inside the small arena of the stadium, players are able to use moves against each other. Players cannot access the arena in the stadium without being warped by staff as the stadium is usually used for weekly events.