Shiny Pokemon Encounters

[NICKtendo DS]

Borrowing my friend's Pokemon Black in preparation for the Poke Transporter/Pokemon Bank. So far, all Pokemon I had in Platinum that I didn't in X has been moved to Black.
My friend told me I could have that game's Reshiram, Kyurem, Victini and the musketeers, because he also has Pokemon White 2 (in case of Victini, he has both event ones. I get the Liberty Island one).

So why am I posting this in the shiny topic?
While hunting for an Elgyem to bring to X, a Shiny Litwick just popped up. Got it in the Quick Ball! That's the second Shiny I caught in this game, the first being the Shiny Golett I caught 2 years ago. He can keep the Golurk, but I'm taking the Litwick.