There ARE some other glitch Pokémon...
Like m, M., and ... I THINK Magikarp...?? I just remember surfing up and down that 8 or 15 square grid extremely persistently when I was this little eight-year old, hiding my GBC deftly among the pages of my textbooks and notebooks as the days passed, with the sound turned off, to conceal my movements.
I did that since I read on a guide somewhere online that even if you messed up your Elite 4 Hall of Fame you could change the background colours to - ... and it had a long list of what you had to do to get each preferred colour of the rainbow.
The specifics elude me.
I remember most clearly about my sister that she yelled at me due to how quietly I came down the hallway on a parentally-assigned mission to wake her up.
I never got caught.
N.B. This is a twenty-seven year old memory I am revealing to you.
I think MISSINGNO. changed INTO a Magikarp if you caught it, and that's what I was struggling to remember.
Oh, listening to the Pokémon Surf Theme I remember having set lyrics to that before - but I don't remember what those specific words were.