>>35206536Because GF has a pretty weird idea of what flying type is supposed to be.
Originally it was actually supposed to be called bird type or something like that but they scrapped that and instead made it more of a general air type.
And since there are no Pokemon aside of the literal wind genie and god who are purely "air", they all need to have a secondary type. And normal is just a very general type that can be applied to just about any Pokemon.
