Shazarro was created when Mister Mxyzptlk extracted him from the demented imagination of Bizarro. This inner "Bizarroland" is populated by manifestations of the monster's fractured and distorted understanding of the world around him. Mxyzptlk found Bizarro's mental rendering of Shazam, stole his secret word, and bestowed it upon young Freddie Dingus–truly, the biggest shithead on earth.