Muh For now at least makes it able to change your pet visual to other pet that already available in game. Using their egg as catalyst
I would suggest for pet disguise from the mob that is not available as a pet, either in form of ticket or egg as catalyst to be used as costume for the pet that can be obtained thru muh coin (or muh point) or event quests. But my recommendation is that they should have their sfx turned off (coz mob like muka is noisy). Ofc there is also an option for custom sprite pet. Heck you can also tied it to achievement reward from running certain instance to get their mvp sprite as pet disguise (fenrir or loki or thanatos as your pet im just saying..) beside title reward.
