Pennywise, the antagonist of all iterations of Stephen King’s It and its adaptations, is generally a very menacing clown. But he’s not only a menacing clown—he’s also a freaky shapeshifter with a penchant for creative disguises and the occasional goofy stint as, like, a fish tank or something.*
Source: io9 – This Video Showcases All the Myriad Transformations of Pennywise the Clown