Comic Book is reporting that the mischievous and prank-playing fifth dimension imp, Mr. Mxyzptlk, will be appearing in Supergirl on two episodes when the series returns next year.
Mostly, however, Mr. Mxyzptlk is a fun character that serves as a perfect foil for Superman, using magic to get under his skin and wreak a small amount of havoc in the process.
Usually associated with Superman, Mr. Mxyzptlk is a magical creature who enjoys playing jokes with The Man of Steel in order to get under his skin.
Under the banner of The CW, however, Supergirl has really begun to fly.