Hmmm... Every shiny I have is from GTS.

Shiny:
+ Lucky Egg for (I offered Bunny)
for lv1 (Guess they tried to clone but didn't know Gorebyss could be >lv 9:D)
for female (I offered Eevee)
for

Other cool trades:
Adamant Dragon Dance/Waterfall/Ice Punch/Dragon Claw
lv 70 + Master Ball for lv 100

I got a shiny porygon 2 for a yanmega.

I traded my Regigigas for a Wurmple.

I once got a Deoxys for a Starly.

I never actually found the Strength or Rock Climb HMs my first time through pearl. I was trying to get a steelix, and found one on GTS in exchange for a Misdreavus. I went out, caught one, and traded for it. Steelix's moveset was Strength, Cut, Rock Smash, and Rock Climb. Ready-made HM slave :D

yeah you were right about the bunearies

anyway mine was this:
i saw a shiny lv.50 mesperit on the GTS and i wanted it. they wanted mew lv.9 and < so i got one off the GTS and got it!!!!!! and its legit!!!!!so happy!

Hehe, cloning back fire.Mine? Level 79 SHINY Giratina for for a Mew I cloned. Wow. To this day, I clone Mews and trade the clones.

This wasn't really accidental, but I traded a lv.100 Lucario that was raised by a casual player (no EV training, good natures, etc.) for a lv.100 Shiny Rayquaza, although it was hacked....

I got a level 50 Palkia, with a pretty crap moveset, but a good nature and quite good IV's for a level 22 Driftloon. It wasn't hacked either. I also got a hard-to-get spiritomb for a very easy-to-get chimecho. Are these guys maniacs or something?

I think I might've said this but:
A guy was offering a Mew Lv. 100
And the guy wanted (proof the Mew was probably h@xx3d):
...
A MAGIKARP
So I did it, and it was hacked, with terrible DVs (NOTHING above 10) and an OK nature (Rash, which hardly is ok, but oh well)

Nothing says HACK like A shiny Rayquaza caught on route 202 @ lv 100
I Did Get a legit Shiny heatran It wasn't awsome but not treible
I have a bunch of cloned shiny magikarp

ok like 20 posts before me some one said they got a dialga for a feebas? i dont see why because i got a shiny feebas first try fishing for one theyre easy! but why are they so important than?

I got a Shiny level 100 Lucario for a level 6 Piplup. The Piplup was my brother's that he traded me. This was after the third gym.

I just want to say that i'm amazed that this thing is still here. I started it on May 29, 2007 and it is currently April 09, 2009!!!!!!!!!! that is almost 2 years for something i thought would be long dead by now. i just want to say. Wow

p.s. almost 2 years and only has 2 pages that is f n crazy

Firstly You're so happy that it's not dead and then You're complaining that it has only 2 pages .

It that kind of trades would be more common then it surely had about 10 pages but hey! Those are great ACCIDENTIAL trades .

I'm not complaining, I find it freakin' hilarious

Accidently traded my level 100 Gyarados for a level 19 japanese magikarp, managing to clone it before it went through... suspenseful.

I had, I think, a level 45 Tentacruel in the GTS and asked for a Garchomp any level, I checked yesterday and I got a level 85 Garchomp.
I check Deoxys in GTS, too, and I almost got one level 100 for a Happiny level 5, and my friend got one, I forgt what level, for a Bidoof.

Shadow Deoxys:

Spiritomb is breedable, so it's not as hard to get.

I just now got a level 70 10 Aniv Celebi for my lvl 8 male oddish