Sorry if I don't have the permission to double post, but I think this really needs clarification seeing the other logs as well:
The Pokémon in your TEAM already have +1 Battle; meaning they're counted to be involved in a battle, even if they didn't actually battle.
Example:
Your team:
Abra
Beldum
Chimchar
Ditto
Elekid
Finneon
Even if only your Abra or Elekid was involved in the battle (meaning you won and you didn't get to use the rest of your pokés, the other 4 STILL get the EXP; +1 battle)