Back in the early 90s, I used to write TSRs (Terminate and Stay Resident, now there's a term you haven't thought of in a while) that would do goofy crap like make your screen fade in and out if you typed a given word, and then return to normal behavior if you typed the word again. I think I missed out on my calling as a virus writer, which would have netted me zeros and zeros of dollars.
I think "Bad Street Brawler" may have been the European title? I remember the game as "Bop 'n' Rumble", a sort-of sequel to "Bop 'n' Wrestle".
In the game, your wrestler guy walked through various side-scrolling urban landscapes assaulting various people & animals. The old blind dudes were the most common enemies, often coming at you in packs. There was also a Ruth Buzzi-inspired little old lady who would use her purse as a weapon, a bulldog, a...gorilla..for some reason and a dude on a motorcycle.
This guy's channel is gold. I spent so much of my morning watching these videos that I was almost convinced I had a DOS 6 installation infected by AIDS and airplanes.