Mr. Mxyzptlk is back in Superman 148 (Oct. 61), in a cover story by Siegel, Swan and Moldoff.
He gets the brainstorm to legally change his name before heading to Superman’s dimension, as then saying his former name backwards will have no effect.
Superman tries his usual tricks, but with no luck. Mr. Mxyzptlk is more than happy to reveal his change of name, knowing that Superman will find it impossible to guess.
It’s the Superman Emergency Squad who save the day, lead by Van-Zee. They pretend to be Mr. Mxyzptlk, even to the point of apparently vanishing when the name is said backwards. Mxyzptlk has to say his new name backwards to try to prove he is the real thing.
The Superman Emergency Squad, and Van-Zee, had both been introduced in other Superman books within the past year, before appearing here.