What was your first shiny and how far in your playthrough were you?
Mine was a buizel, it was the first buizel I ever saw, and the 6th wild pokemon I had seen. I just now realized that i was insanely lucky with the 1/4096 odds
Teddiursa. i was in massive-mass outbreaks when i saw it. i caught it and was happy. i forgot to do autosave tho :,(
But for ones that were saved,
Haunter. i had long-completed the story and going through massive mass outbreaks and i heard it before i saw it. my heart raced and i was really happy with it
My first shiny was the guaranteed shiny ponyta, and I did the quest after I beat kleavor. My first non guaranteed shiny was an chansey I found while procrastinating the electrode fight.