89555459_ners___Pokémon_Essentials_Wiki__What_it_means
[Comment] DoubleBattle: true [What it means] 
This battle is a double battle. Typically used for when you have a single trainer type (i.e. sprite) that depicts two trainers (e.g. "Sis and Bro" depicts a female "Swimmer" and a male "Tuber"), or when you just want a double battle against one opponent.
Trainers - Pokémon Essentials Wiki
What it means