I'm seriously having concerns at this point.
About 14 months ago, I hacked my LeafGreen game to have the Altering Cave spawn Mareep, because I want a shiny Mareep in 3rd gen. Harmless, right? But after 14 months of hunting at least a little nearly every day... over 130,800 encounters without a single shiny, I swear something is wrong with this game.
The odds are 1/8192. Yet, I've gone over those odds at least 15 times. I don't understand, I've seen people get shinnies through hacking their Altering Cave without a problem.
For all I know, it is just me being insanely unlucky, but this is driving me crazy. Does hacking a game prevent shiny Pokémon from appearing?