Hello everyone,
OK I don't remember much. I was around 4 or 5:) so forgive me in advance, but I will try

It's an old movie 80ies or 70ies maybe even prior to that ,but not after that for sure.
The only thing I remember is a black cat with a kind of bracelet around its neck. Looked like diamond or something, and it glows, or glowed at one point in the movie. Also I vaguely remember a section where either the cat gets off a space ship or into one or perhaps both at different times lol.
That's it. I have no idea what it came on earth to do I am sorry :( hope you can help me out. Thanks. Big kiss to the person who finds it.

PS: I have tons of other movies that I will be asking about :)

Maybe "The Cat from Outer Space (http://www.imdb.com/title/tt0077305/)" (1978) The cat's collar has magic powers. I don't remember a lot about the movie though.

I believe that my esteemed colleague Stardust713 is correct on this one. Oddly, though, there was another necklace-wearing black cat that was monkeying around with spaceships, although this other one (http://memory-alpha.org/en/wiki/Isis) was from the memorable "Assignment: Earth" episode of the original Star Trek series.

Thanks, it must be one of these two. I will look for snapshots or short clips from each. The cat in "the cat from outer space" doesn't seem to look black though. The second one is more like it, but the collar is wrong and should be more like the first :) I might just be going crazy...

In the star trek episode, the cat was with Gary 7 a character from the future. The cat could morph into a beautiful woman.