Reason for off server: Indie game, bandwidth aint free.
How it works: Small macro that generates a unique discord chat server at the start of a battle. Its then linked in the game chat. "Click here for discord battle voice chat" The room is then deleted when all users leave.
A disclaimer should be included as well saying that pokemmo is not responsible for anything said or links clicked.
The same voice chat protocol could be started via a right click type command outside of a battle.