Yukigaru comes from a hidden village where all born become thieves and most end up joining the Thieves Guild, known to make some of the best thieves in the world and keep many treasures and riches the village steals. All pokemon who are a part of the Thieves Guild live and die by its creed, “A true thief steals from criminals and the corrupt. There’s no challenge in stealing from the innocent.” Anyone who breaks this creed will be permanently transformed into a diaper.

One day a Zoroark named Yorha came to attack the guild, wanting all of its treasure and riches. However Yukigaru took her out and turned her into a permanent diaper, putting her on and claiming her as her diaper.