If Mighty Mouse is a Superman analog (and he is), then he needs a crime-fighting pal. Bakshi and his crew obviously had their eye on Batman comics at the time, giving us a pretty well post-Miller Bat Bat, but with more than a hint of Burt Ward in The Bug Wonder (the red, tick-like fellow atop Bat Bat's shoulder).
This was all during an era where Bart Simpson was still considered terribly edgy and bad for children, when cartoons were mostly considered strictly juvenile entertainment. The goofy satire and riffing on old serials and whatnot was surely lost on the kids who were supposed to be watching the show. But with a soft spot in my heart for Mighty Mouse, I'd tuned in - and I thought the show (when I could catch it) was pretty great.
You at least need to skip to 0:49 to see Mighty Mouse calling upon Bat Bat for assistance.
You also have to like how he drives the "Manmobile".
In my possession I still have the Wendy's Kid's Meal collectible Bat Bat.