I call first route rat!

You have the patience of a saint. I would probably give up after 500 SRs for the starter! Good luck with this challenge!
I would have no trouble encountering all-shiny Pokemon, I have an "All Pokemon Shiny" code for White. Your rules don't mention not using an Action Replay after all. And even then, PokeSav can make a very legit-looking shiny Pokemon. It would be easy to claim it's a legit shiny, and nobody would be the wiser unless they looked at the actual HEX Value and whatnot.
I smell something fishy with the 7-resets for a shiny Snivy. Pics or it didn't happen.
Signature is a WIP for the moment.
For now, I have claimed: Mewtwo, Member's Card, Wide Lens, Honey Gather, and Psystrike.
Claims: Oshawott, Ice Body, Magmarizer, Griseous Orb (July 1, 2012) Cross Poison (September 26, 2012)
Roxie will always be Homika in my mind.
Was once chibichernikova. Now is Fennekindle.
Visit my tumblr~
In 15 years, and only maybe 8 of continuous playing, I only met 2 shinies by accident, 1 rattata and 1 banette. And I played all the games of the main series. I never SRed and I did have a LOT of wild encounters, given how much time I have played all the games.
If you wanted to make this run infinitely close to impossible, how about you combine your idea of a Shiny run with a Nuzlocke challenge? I mean, if you're looking for something impossible, THAT would be the way to go.

This challenge seems like a waste of time if you ask me. One would need ample amounts of time just to even find a shiny starter. Why would anyone do such a time consuming, and overall extremely luck based challenge?

Woah, Guys. 7 SR's may be extremely lucky, But its not impossible. My friend was SRing for a shiny pokemon, And he did it while I was over, Just to prove a point. We were amazed, Because it only took 26 SR's. It was a Chikorita, I believe.
Also, Good luck. I'm very impatient. I've got something around 900 SR's on a Shiny Giratina hunt. Sooo.... Long...'
Wonder what the first shiny'll be!
I've claimed
Pokémon
Zoroark (26/9/12)
Moves
Earthquake (26/9/12)
Items
Tidal Bell (26/9/12)
DeepSeaTooth (26/9/12)
Abilities
Magnet Pull (26/9/12)
Mew

I've claimed
Pokémon
Zoroark (26/9/12)
Moves
Earthquake (26/9/12)
Items
Tidal Bell (26/9/12)
DeepSeaTooth (26/9/12)
Abilities
Magnet Pull (26/9/12)
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