From Bulbapedia, the community-driven Pokémon encyclopedia.
Gena (Japanese: モナーク Monarque) is a recurring character in the Pokémon anime. She is a world famous Poké Puff maker who first appeared in A Battle by Any Other Name!.
Gena made her debut appearance in A Battle by Any Other Name!, where she acted as the chief juror of the Poké Puff Contest. She was called on stage to announce the results of the preliminary round of the competition. As she was explaining to the audience what Poké Puffs meant to her, she was approached by Bonnie, who proposed her to marry Clemont. After Clemont grabbed Bonnie and took her off stage, she announced that Serena, Miette, and the Berrybaker kids would proceed to the final round.
The next day, she announced the results of the final round. She first told the audience what kind of Poké Puff each of the finalists had made. She then announced the winners to be the Berrybaker kids.
She appeared again during Performing with Fiery Charm! where she was one of three judges during the Theme Performance of the Dendemille Town Rookie Class Pokémon Showcase. She judged alongside her Jigglypuff. They let Miette, Jessilia, and Serena advance to the Freestyle Performance. At the end of the Freestyle Performance, she voted along with the audience to decide the winner of the Pokémon Showcase and was shown to vote for Serena.
This listing is of Gena's known Pokémon in the anime: