Assuming that you catched the Red Gyarados, did you use it in your team or did you leave it to rot in the PC? For both scenarios, why? Do you like having shinies on your team? Maybe you already had a Gyarados? Perhaps it didn't fit the 'motif' of your team? Perhaps yopu were dong a challenge and it just wasn't right?
I left mine to rot in the PC unfortunately. I mainly just enslaved it, using it for HM's -- waterfall and surf.
What about YOU?