Fluffy

Mary's Mareep (nicknamed Fluffy) is an -type Pokémon owned by Mary.

Biography
Mary has her own Mareep, Fluffy, that used against Ash's Pikachu. However, since she was not experienced yet, Fluffy was defeated. Later, Mary proved herself when she had the other Mareep power her Fluffy up to defeat Team Rocket. Her mother, Ellen, was impressed and allowed her to fight at the Festival.