I think my best find over wonder trade was a shiny Salazzle in a love ball. It was lv100 and had good ivs/evs etc. so I can use it for breeding too, even if it's cloned or hacked. Also PS; I changed the thread title so it can be a discussion topic.
For me, my best Wonder Trades were a shiny level 100 Shaymin and a shiny level 100 Celebi. Both had perfect IVs and good natures. They were probably hacked to the ground, but they're mine regardless!
I've gotten so many shinies over wondertrade, I've lost count. My favorite ones were shiny keldeo and shiny shaymin, both level 100.
Probably my shiny Braviary. It looks so nice in blue. I've only ever gotten one legendary and it was a Regirock.
I've never gotten anything good of WT... Only starters and weaker or uninteresting Pokémon (Bidoof, Cherubi, Basculin, etc). Then again I dont really use it much. I'm more of a GTS person.
I got a Shiny Level 100 Milotic from one of those 24-7 Hacked Streams I gave it away because it was in a Dusk Ball. Love Ball Feebas all the way.
I havent used WT a whole lot in Gen 7, but in ORAS I remember getting a Shiny Latias once. I also remember getting a shiny Skiddo at one point.
I only remember getting some hack shinies and a Keldeo over WT. Pretty weird considering I only get route 1 mons lol.
I've gotten several hacked shiny Pokémon through wonder trade. Ferrothorn, Gothitelle, Xerneas, Mew, Gensect, and probably a few others. I refuse to use them though, even for breeding. Aside from that, I've gotten a lot of near-perfect IV Pokémon that have really accelerated my breeding. Cutiefly and Purrloin with 5/6 perfect IVs were received in my first WTW, and lots of Littens since then.
I got plenty of good shiny perfect IV's Pokémon from wonder trade (Mew, Shaymin, Tauros, ditto, and more that I don't remember at the moment) but I've also given away boxes full of perfect or near perfect IV Pokémon that I bred
I’m probably forgetting many of them but here are the only ones I can recall. In the same setting that I found my first shiny, I got a Cresselia and a shiny level 100 Infernape (I think it had Iron Fist and fist moves to go with it). And some thanks to WTW: Nihilego and...
Not as shiny/amazing as a legendary, but I always get a bit excited whenever I receive a Pokémon in an Apricorn Ball XD Those Pokeballs are just too cool to pass up!
A level 100 mewtwo with thundershock, psychic, blizzard, and recover If it loss 1 hp a day then it would die after a year, because it has 365 hp