The first method is very simple! All of you remember that in the beginning of the game you are given a choice between three Pokémons – Chermanderom, Squirtle and Bulbasaur. But not many people know that if they do not catch them and pass away then the first will appear Pikachu.
Most likely, this is a reference to the original anime series, in which Ash did not get none of these three Pokémons, which he really wanted to, because he slept the day of distribution and all of them apart. But there was only a fluffy yellow but irritable and an electric one which they had never never parted. Therefore, if you do not want to rely on the case, start the game again, and use this method.
The second method: a small electric Pokemon, with some probability, can hatch from the eggs but only two hours. Therefore, if the first method does not suit you, use the second and use only 2 hours eggs.