I remember Felix because my friend in high school had a bootleg "Eelix" watch that was "shockproop".
And Todd MacFarlane used to hide Felix in every issue of Amazing Spider-Man. Does anyone know when he stopped doing that?
And there was a porn version where Felix was a girl cat with a "magic box", and some evil girl cat with henchmen and a dirigible wanted her magic box, and after capturing her, naturally assumed she had it hidden internally, and reached RIGHT IN up to the elbow, yelling WHERE IS THE BOX?! and girl-Felix whispers back "You're in it."