Mr. Mzxyptlk

Superman v1 #30

Superman #96

World's Finest #113

Superman #174, 283, 349

Action Comics #583

Superman v2 #11

Adventures of superman #441

Action Comics #721

Superman Man of Steel #56, 75

Batman and Superman World's Finest #6

New year's evil Mr. Mxyzptlk

Superman and Batman World's Funnest

Superman Secret Files and Origins 2004

Adventures of Superman #630, 634, 638, 646

Countdown to Final Crisis #23

Superman Adventures #6, 16, 26, 38, 40, 41