In which game did you get your first shiny Pokémon?

Aside from the red Gyarados in G/HG/S/SS, of course, my first real shiny was a shiny Pidgey. I had gotten this game off of a E-bay that was a Spanish gba version of Crystal. It was most likely a rom hack of some sort in a physical form I could insert into and play on my ds, but it was very glitchy. It was just titled Crystal. I didn't know what a rom was at the time, but after a few years of having it, I realized it was just a poorly made rom hack remake of Crystal that some Spanish kid had decided to sell. It was a complete waste of my parent's credit card that they sometimes let me use. Anyways, I was on some sort of route, and I was just running through the grass trying to find my way on my way to the next town when a wild Pokémon battle started. I was expecting just a Pidgey, Hoothoot, Sentret, or whatever, but instead of having run into a regular Pidgey, it was a shiny Pidgey! But, since I was quite inexperienced at the time, I killed the Pidgey off. What happened was it's HP was at the yellow point, and I thought that I would be able to land in one more hit without defeating it and leave it at the red point to capture it, but I didn't understand the concept of critical hits and my Cyndaquil's Ember landed a critical hit, killing it off. I don't have that game anymore. I threw it away a little while after I realized what a rip-off it had been. Now I don't trust E-Bay anymore.

My first ever caught shiny was a shiny Sentret in the rom hack Pokémon Fuligin I was playing on my old phone a few years ago. It's actually a good rom hack, so you may want to check the game out sometime. Anyways, I was running through the grass just looking for Pokémon when - tada! - a shiny Sentret appeared. I was super excited and I luckily had plenty of PokeBalls, so I just went for it. I managed to capture it easily. I still have the phone stored away with the rom. Hmmm... maybe I'll pull it out again.​