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.