Lobby Morphs are mobs the player can turn into. There are 14 available morphs. They were added 1st April 2016. Two more Lobby Morphs were added in 1st February 2017. At first players were able to see themselves disguised but this feature was removed due to the mob blocking the screen in some cases.
These morphs only work in the Lobbies. They can be only obtained through Donator Ranks. You can choose a morph through the Cosmetic Menu.