What kind of species is Kirby?

The exact species of Kirby has never been officially specified in the Kirby video game series or any related materials. Kirby is portrayed as being an alien or possibly cosmic being in the games and often referred to as "Kirby of the Star." He inhabits the fictional planet of Pop Star along with various colorful characters and creatures. Throughout the franchise,Kirby possesses unique shape-shifting and copy abilities which allows him to transform into the likenesses of his enemies and use their powers