From Bulbapedia, the community-driven Pokémon encyclopedia.
These are Trainer classes that can only be encountered in Double Battles. While they are depicted as a pair of different Pokémon Trainers, they act as a single Trainer: they draw their Pokémon from a shared party, meaning they will always send out any remaining Pokémon to battle (unlike two unrelated Trainers that trigger a Double Battle when they see the player simultaneously, who draw Pokémon from independent parties).
In Generation VII, Trainers who are a part of specific Double Battle Trainer classes are individually referred to by the Trainer class they are based on while in battle.
Pages in category "Double Battle Trainer classes"
The following 37 pages are in this category, out of 37 total.