Character: Nymphia (Serena)

Sylveon (ニンフィア), the Intertwining Pokémon, is a Fairy type Pokémon and a brand new evolution of the first generation Pokémon Eevee. Its type was kept a mystery until the official reveal. Sylveon possesses abilities to move its antenna-like ribbons on its body which uses it to relieve the feelings of both humans and Pokémon. Also the ribbons act as a leash when it walks with its trainer. Sylveon can learn a new Fairy-type move, Moonblast, that allows it to borrow energy from the moon and attack the opponent with a powerful blast.

Sylveon appears in the short feature Pikachu and Eevee Friends that accompanies the film Pokémon the Movie: Genesect and the Legend Awakened in theaters, wherein it is voiced by Shoko Nakagawa.

Valerie's Sylveon attempted to cheer up Valerie when she was concerned about finding some models for her Florges and Lisyan patterns that were part of the Furisode Collection.

During the Gym battle against Ash Ketchum, it faced off against Ash's Fletchinder in the first match up. Valerie talked to her Sylveon in Pokémon language and it was able to more or less understand what she wanted to do. Valerie's Sylveon being a Fairy type is delicate but strong. It used its tail ribbons to its advantage during the battle to capture Ash's Fletchinder from moving about but he countered that but charging right into Sylveon with Flame Charge. The battle came to a climax when the two charged at each other with Giga Impact and Steel Wing but Ash's Fletchinder came out victorious and knocked out Valerie's Sylveon to win the first match-up.

Première's Sylveon battled against Ash's Froakie. Ash had never battled against a Fairy type Pokémon before but he was enthusiastic nonetheless. The battle ended after Ash's Froakie became infatuated with Première's Sylveon due to the Moonblast / Draining Kiss combo.

Première and Nymphia go out to the forest or the meadows every day and bring back wild Pokémon they've befriended to show the children so they can interact with Pokémon.

Première's Sylveon was captured along with Pikachu but with Ash's help, they were set free and it was returned to Première.