Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Oh, I know, shiny Gyarados annoy me to no end. Shinies in general annoy me unless they have a nice colourway. Most don't, and Gyarados especially doesn't.
All of the above is possible. I am updating my trade thread with friend codes, and I'll have to clone/shift a nicknamed version. Can you trade in about 5 minutes?