Even just now, when I did a search for his page to ask this question, I was thinking "Mr M... y?.. Mx?... Mz?... WHAT LETTER COMES AFTER THE M???

I just remember how it's pronounced...by then it's not hard to spell it.

I figured out a way to remember. After seeing him in superman the animated series and he tells superman how to say his name by saying "Mix, Yes, Spit, Lick" you pretty much take out the vowels, switch the S for a Z, and lose the C. Mxyzptlk.

I never heard his name as voice, but Italians used to put random arrangements of consonants to form intricate words. So I just got used to memorize such things like a poem. You pretty much never forget one if you do it like that.

Mr. M-xyz-tplk once you remember the xyz part you never forget