RE: Your very first shiny!
I actually bumped into a shiny hoothoot on my emulated pokemon Crystal... at first I was like "huh the computer screwed the color up." But I just realized what it was too late when I loaded state... cause I was frame-skipping I didn't see the sparkle... -_- But yea that actually is my *legit* shiny I never expected. Otherwise the only real one would be Ralts from DP since I used the PokeRadar but I hated that thing so much and you kind of expect it coming, doesn't have the same proud feel as opposed to running into it.
Same thing goes for the roaming pokemon. When you know where they are, it kind of ruins the encounter, you're just less surprised and impressed. Ah, Gold and Silver... my favorite pokemon games of all time...