Grandmother Blissey is an elderly pokemon from Pokemon Journey. As her name suggests she is the grandmother of Pikachu - he calls her "Grandma". Grandmother Blissey has been apart of many events in Pokemon History. She tells stories all about her time as a young Chansey and even sometimes Happiny. She play a very important role in Pokemon Journey as the stories she tells often relate to a level, for example: she tells a story about a hotel that flooded as she was staying there, she mentions hidden passages the Pikachu and his friends need to use to complete the level.
Grandmother Blissey looks just like a normal Blissey, however, her skin tone is rather pale and she has wrinkles around her eyes (her wrinkles are only noticable in her promo artwork).
Grandmother Blissey is a very kind and helpful Pokemon, she does however, have a secret darkside.