"What happened to ____?" versus "What happened _____?"

I seem to remember my parents, who came from Dublin, Ireland, saying a phrase like "what happened it" or "what happened him" rather than "happened to it" or "happened to him".
But it might have been someone else. I lived in NY until I was 4 and after that have lived in California.

Since this is a childhood memory it might have been just another kid who left out the word "to", but I think I've heard it from more than one person and it's an idiom or colloquialism. Has anyone else ever noticed this, and if so, what's the location you're most likely to hear it? Am I just crazy?

I'm Irish and it is indeed likely that your memory is correct. It is very common here to say "what happened him" and leave out the "to". I'm not sure about anywhere else but certainly across different Irish cities it would be more common to say this rather than "what happened to him".