Shellos from platinum (Saving it for a D/P remake lol)
Ponyta from platinum (Bad nature so untouched)
Roserade from platinum
Swablu from gen 4 from a friend who traded for a fall2010 Mew
Kyogre from HG/SS don't remember which, reset for 40 hours in 4 days was so happy when I got it
Garchomp from Black 2, the one you get for beating a tower. Couldn't get Hax because wifi was shut down ��
Audino while grinding in friend safari on XY, was completely unexpected didn't know FS had an increased shiny rate
Lugia and Ho Oh from soft resetting on ORAS
Feebas from chain fishing on ORAS
Bred Flabebe and Bagon on AS specifically for my Moon play through which I'll be starting soon
Bred two Pawniards on AS, one with horrible speed IV
Bred a shiny Eevee on AS a few days ago which will be an Umbreon very soon
+ a few events.. might be forgetting some.
Edit: a day after I made this post, while breeding for my Moon team in Sun I unexpectedly (without shiny charm) got a shiny Bruxish, had to use an ability capsule on it and it's male.. but I'm still very happy I got it!