What do you do with your shinies?

I leave them in the PC to rot. And occasionally brag about them.

The shinies I get are usually Pokemon I don't really care for (except that one Scyther), and they're just...not that good. I still feel excited when I get them, but I wish that I got more Pokemon I actually like!

I box them with my legendaries and other special one-time Pokémon. Right now the only shinies I have are a Grimer caught in the Fiery Path in Emerald, and a shiny Leafeon that's part of my SoulSilver team. The Grimer collects dust while Leafeon is level 78 and an active party member, so I guess it all depends on whether the Pokémon is useful or not.

With my random shinies, I usually save them to send to another game to be a part of my team there. As for my RNG'd shinies, I swear I'll get around to EVing them all someday... :(

I box them. I have one I found in the wild: my shiny Throh, and I have numerous starters that are shiny, but I traded to get those. I battle with those.

It depends on the shiny. Like a lot of you, I leave most of them sitting in my box (and occasionally take a few minutes to look through all of them and pat myself on the back). I don't like to trade shinies caught on my own OT, so they just stay there. Sometimes, if I like the shiny, I'll EV train it and add it to my usable group of Pokémon. There are also a lot of shinies that I would like to EV train, but haven't gotten around to training, and I don't generally feel like taking them out of my PC until I'm ready to EV train them.

I keep all shinies that I catch in a saved PC box for them. I don't ever trade them nor do I train/evolve them. I just keep them the way I got them, I think of them as trophies in a way haha...

I just caught my first Shiny today! She's a Poliwag and I think I'll add her to my party. Which should I evolve her into Poliwrath or Politoed? I can't decide!

I put them in their own box, unimaginatively labeled "Shiny".

The only one I used for any length of time in-game was my first - a Zubat in Leaf Green. It was a mainstay in my party all through the game, mostly as a Golbat, then I finally got to evolve it to a Crobat after I got the National Dex, and found that I really didn't like the Crobat shiny sprite much. Then I caught a bunch of shinies I wasn't much interested in anyway (Doduo, Tentacool, Spoink, Voltorb...). Some of them were cool shinies, but they weren't pokemon I actually use much, so I started just putting them away. That then became my habit, and since then, that's all I do. The only one I've even had in my party for any time since was a Swadloon I caught in Black, just because I wanted to evolve it to a Leavanny. Since it's a happiness evolution, I didn't actually use it at all - I just carried it around in my team and got it massages and such until it was happy enough, then fed it a rare candy and evolved it, then put it in the Shiny box.

I usually leave them in their PC box. Sometimes, I'll train them, like my shiny Red Gyarados, who's just an absolute beast, but my shiny Lanturn gets the box.

I release them, unless it's a pokemon I don't have another of.

If it's a useless Pokemon, boxed. If it's handy, then I could consider using it. I use the Red Gyrados from the Lake of Rage but my shiny Luvdisc has been rotting in my PC.

i keep them in my pc box, or train them how i want them to be and then use them to help train my other pokemon or use them in in-game battles.

The few shiny Pokemon I've found haven't been all that great, so I've mostly just left them sitting in the PC like quite a few others. I did try and put a lot of effort into my shiny Ducklett/Swanna in White 2, but I already had much better Water and Flying options on my team, so I just gave up on it.

Keep em in my PC, I keep the ones that I have caught and trade away those that I haven't

All I've got is a shiny FS Ditto, which I use for IV breeding until a superior offspring comes along. Hatched a 3IV shiny Charmander which is periodically a member of my team and is currently lv 65 Charizard, tough to use her though when my other level 60+ Charizard has 6IV's and is EV trained... I thought about using a reset bag and EV training my shiny, but I like her how she is and I don't use her competitively. Looks awesome with the Y mega evolution stone.
If I hatched a decent IV/natured shiny Tyrunt it'd be the happiest moment of my Pokemon 'career'.

Well, the only shiny that I've run into that was one I wasn't trying for was a Wingull, I tried to use that one in my team but I really just couldn't find a spot for her, so she stays in the PC mostly.

All the other shinies I have are ones I've bred because I want them on my team, so those I'm currently levelling up and using in gameplay.

I treat my shinies like I treat my legendaries: I just box them and never touch them. I just see them as too valuable to do anything with them and I'm afraid that I might mess them up by training (even though you can delete EVs so that isn't the most important factor) or regret evolving them because that can't be reversed.