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A wild Munna used in Fennel's research is encountered at the Dreamyard. After obtaining the Trio Badge, Fennel asks the player to bring her some Dream Mist. However, Team Plasma also wish to obtain Dream Mist, and are abusing the Munna in order to achieve that end. After they have been defeated by the player and scared away by a wild Musharna, Fennel obtains the Dream Mist and Munna is saved. Bianca then tells the player that she will go look for the Pokémon they just saw, making it a possibility that this Munna is the one later appearing under the ownership of Bianca.
Fennel is shown to be the owner of a second Munna that she uses in the Pokémon Dream World. This Munna, nicknamed ドリームDream in the Japanese version of the site, is seen when the player uses the demo version of the Dream World. Having no Pokémon of their own to send to the Dream World, they are instead accompanied by Dream. She has a Docile nature, was caught in a Premier Ball, and is at level 10.
In the anime
Fennel and Munna in the anime
In the anime, Fennel's Munna helps her with her research on the Dreamyard and Musharna. It first appeared in Dreams by the Yard Full! when Team Rocket had awakened Musharna, when Fennel noticed its eyes were suddenly glowing pink. It was then seen with Fennel helping Iris's Axew wake up by sucking off the Dream Mist caused by Musharna and revealing Axew's dreams. Later Fennel, Munna, Officer Jenny, Iris, and Iris's to-be travel companions rushed to the Dreamyard, where they found Team Rocket had caused all the problems. Munna helped call for Musharna which appeared.
Suddenly Team Rocket captured Musharna, however Munna used its Psychic to cripple the machine, giving Pikachu a chance to destroy it with Volt Tackle and free Musharna.