The Berrybaker kids are characters of the day who appeared in A Battle by Any Other Name!. They competed in the Poké Puff Contest with their Makuhita. At the end of the preliminary round, it was revealed that they had advanced to the final round, which made them and their Makuhita very excited. In the final round, they made Japanese-style Poké Puffs. When the final results were announced, they were declared the winners of the competition. (Source: Bulbapedia)