Might take a while. I've been having bad luck with the breeding -_- I'm still only at the first one (bulbasaur) and it keeps coming out wrong, so I decided to take a break from it, if you don't mind.
UPDATE: so far the best I've been able to do are a male Bulbasaur with Chlorophyll and 31/x/31/31/31/31 stats, but a bad nature (Sassy, sp def up and speed down) and a male Squirtle with 31/31/31/x/31/x. While the Speed isn't a big problem (they are turtles after all) those attack stats aren't the best for him (that 31 attack should go to sp Attack), but it does have a good nature (modest, Attack down and sp attack up)
Hey, sorry it took a while to reply. So I checked my Y game, and I already have every starter in there. As for Hidden Abilities, I've got those of Bulbasaur, Torchic and the Kalos starters.
Without those you mentioned you already have, that leaves an order for the Kanto starters, Cyndaquil, Chikorita, Treecko, Speed Boost Torchic (unless the one you have already has it), Chimchar, Piplup, Snivy, Oshawott and the Kalos starters, right?
Do you mind that I do this over the weekend though? Kind of swamped.