Mister Mxyzptlk - Wikipedia

Mr. Mxyzptlk, My Adventures with Superman Wiki

Superman - Mister Mxyzptlk(Mega Man) by RoadBlockTron on Newgrounds

Comic Book Historians - Mr. Mxyzptlk premiered in Superman 30, 1944, created by Siegel and Shuster and seems to have a pulp precursor in “Sky Imp” from Fantastic Adventures Magazine, 1943. Coincidence?

Weird Science DC Comics: Wonder Woman #778 Review

How to pronounce Mxyzptlk

Who is more annoying to their respective hero's, DC's Mr. Mxyzptlk or Marvel's Impossible Man? - Quora

The Most Powerful Beings in DC Comics

Supergirl's Mr. Mxyzptlk Has Been Revealed!

Titans/Young Justice: Graduation Day - Wikipedia

Prankster (comics) - Wikipedia

Mr. Mxyzptlk (Character) - Comic Vine