Surely Mighty Mouse time traveled in his comics many times, but the one that I ran across in the Michigan State University library records is a 2-page text piece called “The Time Machine” in #11. I haven’t read it, so I can’t say whether it’s fiction or perhaps something on H. G. Wells’s story.

The mouse did save the day himself via time travel in Mighty Mouse #152.

Variants

(1)
  1. “Mighty Mouse Comics,” |pending byline|, in Mighty Mouse 11, June 1949.