89555459_ners___Pokémon_Essentials_Wiki__What_it_means
[Comment] EndBattle: I'll trainer even harder! [What it means] 
What the trainer says when you talk to them again after defeating them. Use "\m" to split the text into individual messages. There can be more than one of these comments, and each one after the first gives the after-battle text for a different rematch battle (in order). Ideally you should have as many of these comments as you do "Battle" comments.
Trainers - Pokémon Essentials Wiki
What it means