A childhood belief about basements

I'm not sure this should go here, but when I was little I didn't really have imaginary friends, (Mom insists I had one named "Dolphin Girl," but I don't remember that,) instead I had imaginary enemies...
They were some sort of purple gloop monsters, I think I saw one on T.V. once while I was at my aunt's house one night and it stuck. They lived in my basement and if I happened to be jumpy or nervous that day, they would be down there plotting to kill me or something. I would always be scared to go down there because I was sure that if I just turned around quick enough I'd spot one trying to get me!
There was one who came in later on, though, who wasn't exactly a goop monster. I don't really know what he was, but I'd imagine that he had a crush on me and would convince the others not to kill me. It was kind of fun, actually... Once I pretended that the Pokemon in my cousin's Pokemon Blue game would pop out and defend me, too! It didn't last very long though, because I had to give the game back to her...

I've long since learned that they don't exist, of course, but to this day I'm still a little scared of our cold, dark, HUGE basement with the light switches all over the place...