Let's see... Almost all were random encounter 'cept fer Giratina...
Sentret>Furret (FR)
Ponyta>Rapidash(FR)
Banette (Diamond)
Staravia>Staraptor (Platinum)
Abomasnow (Platinum)
Giratina (Platinum SR'd)
That's really it, not many there since I suck at PokeRadar. Right now on my Pearl I'm SRing for shiny Rotom. And a funny story, when I found the Staravia that I caught, it was a bit scary, I was EV training my Pokemon in speed, so I did the throw in swith deal, and I noticed that the Staravia's know Whirlwind. Now I'm just sweating bullets, chucking Ultra Balls in desperation, jusr saying "catch it, catch it" and I did. Yay.
One last thing, not to be a braggart, but I think the RNG was loving me the day I caught my shiny Giratina it only took 168 SR's. Freakin'. Sweet. I don't have many, but in all of my friends and family, the only one to have even one shiny is my sister, she has a Slugma.
I used to have a shiny Palkia, but it was hacked and somehow it changed the pokemon I had up for offer on the GTS a Wailord holding a fist plate... So I traded it and got a legit Japanese Palkia. Awesome.