This save starts you off at the beginning, just as you gain control of your character. Your PC boxes will contain over 600 Pokemon eggs, 2 for every base form (non-legendary) in the game, all randomly shuffled. One will have a common ability, while the other will have it's hidden ability (excluding useless abilities for story gameplay, like Plus/Minus, Frisk, ect.) You have 999 Ability Capsules, so you can either stick to the common ability you have, or choose to flip a coin to see which one you'll get. You also have 999 Rare Candies as well, so your newly hatched Pokemon can quickly catch up to the rest of your party.
Since the eggs stats will be the same with every new run, they all have a neutral Nature, and IVs are set to 14-15 each. Each Pokemon has been given a usable HP type to help cover weaknesses. Use it or abuse it as you want. All Pokemon are legal, other than the normally unbreedable Ditto and Unown eggs.