Pokémon X and Pokémon Y

He keeps offering me said Drifblim, but I keep refusing. Apparently the Spearow came from my Safari as well. Pumpkaboo is slowly starting to take my heart as well (I'm a HUGE fan of ghost pokemon). I may try and breed a couple good natures and such. Is there a trick to your breeding for a shiny? Or just extreme luck? Otherwise that's a whole lot of eggs...Isn't it 1 in like 8,000?

I could be wrong but breeding a foreign poke with your own knocks the rate down by like 2/3s to somewhere around 1/2000-ish.

Correct, it's known as the Masuda Method. breeding with a foreign pokemon increases the chances of finding a shiny pokemon by 6, or something like that.

Also if you are planning on breeding a Pumpkaboo, you should know that it's different sizes have different stats, and that Pumpkaboo's born from a certain sized Pumpkaboo will always be that size.
also, Pumpkaboo in Friend Safari are always of Average Size.