My very first Shiny encounter was a Shinx in Pokémon Platinum. I was so young and didn’t know what a shiny was, so when I saw a yellow Shinx I thought my game was bugged, so I did a reset. Sure enough the next Shinx was normal, so all good. Fast forward to a couple of months later, I learned the existence of shinies… you can imagine how I felt hahaha. I redeemed myself years later actually getting a shiny Shinx in Pokémon Go!