89555459_ners___Pokémon_Essentials_Wiki__What_it_means
[Comment] Battle: Battle me now! [What it means] 
What the trainer says before starting the battle. This comment becomes a simple text message which says "Battle me now!". Use "\m" to split the comment's message up into separate text messages. There can be more than one of these comments, and each one after the first gives the introduction text for a different rematch battle (in order). Also, if there is more than one "Battle" comment, then the player will register the trainer in the phone after defeating them. You should have the same number of these comments as you do versions of the trainer (including the original), even if they are all the same phrase.
Trainers - Pokémon Essentials Wiki
What it means