What Pokemon hatched from your Odd Egg in Crystal Version? Did you soft reset to get the one you wanted? Did you use it during your play-through? The baby Pokemon hatching from it had a %14 chance of being shiny in international game versions (50% in Japan), one of the highest in any Pokemon game. Did you get a shiny?
When replaying Crystal, I got a Tyrogue egg and kept SR-ing it for a shiny - except that I didn't know how to SR eggs, and I had saved while the egg was a step away from hatching! I kept soft-resetting, frustrated that my Tyrogue wouldn't shine!
Tell us about your Odd Egg experiences!