What anime takes place in space and has a girl with long pink hair some sort of small creature pet guy brown hair?

You're likely thinking of "Space Dandy". Here's why:

* Space Setting: The entire anime takes place across various planets and space stations.

* Pink-haired Girl: The main female character, "Meow", has long, vibrant pink hair.

* Small Creature Pet: Dandy, the main character, has a small, furry blue creature named "QT" who acts as his companion.

* Brown-haired Guy: Dandy himself has brown hair.

Let me know if this sounds right!