I think Crystal wins for sure. Shaggy never showed any signs of really being crazy for Google. Also, this is just an opinion but Google's kinda a pointless character and added nothing to the movie. On the other hand, Shaggy was so in love with Crystal that he broke out into song! Crystal also had a little companion for Scooby as well- Amber! Honestly, I don't think there's any competition. Crystal wins hands down.
Crystal. Googie pocesses nothing special aside from other character. She is shown a bit more than Crystal, yet Crystal is more known. Without Crystal, my days of listening to "How groovy" fifty times would of not excisted, this film is one of the better Scooby doo films and takes me back to my childhood.