From Bulbapedia, the community-driven Pokémon encyclopedia.
A Veteran Duo (Japanese: ベテランコンビ Veteran Combination) is a type of Pokémon Trainer that debuted in Generation VII. A Veteran Duo can be challenged in a Double Battle and consists of one male and one female Veteran.
In Sun and Moon, like their Single Battle counterparts, members of a Veteran Duo keep their Pokémon in Ultra Balls.
Pokémon Sun and Moon
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