Olsen infamously became Giant Turtle Man in Superman's Pal, Jimmy Olsen #53... Every one of the personas that Mxyzptlk summons in Batman / Superman: World’s Finest #27 is indeed from a real story.

Jimmy Olsen, Superman’s bow-tie-wearing best pal ... Through the years, Jimmy has transformed into everything from a giant turtle-man to an elastic hero, infiltrated criminal organizations ...

With DC Comics' high-stakes and larger-than-life mythos, Jimmy Olsen, the Daily Planet's intrepidâ and distinctly normalâ photographer, seems like an unlikely friend for Superman.