The mother Raichu finished nursing her newborn Pichu the first time and the babies fell asleep.
The father Pikachu said, "let's not disturb them. They need their sleep".
The first few weeks of their lives was pretty much like this. They drank their mother's milk and slept every day. In the process their fur grew and their eyes opened.
Finally, the day came of their weaning. "Alright kids, you all are going to try something new to eat. Oran Berries!" The mother Raichu presented a blue berry to each Pichu. The babies all ate the berries.
The parents guided the kids outside and they began to play around.
After a while the Pichu felt something in their stomach. They went to their mother.
They explained what was going on, at this stage in life all they could say was their names.
The mother Raichu said, "well you need to go behind a bush and squeeze as hard as you can. It's something all Pokemon do a while after eating.".
The Pichu did just that, and out came a brown substance. The Pichu went back to playing, feeling much better.
The trees at this time had beautiful colors, as it was fall. But soon winter would come. The Pichu would learn what it would be like to play in the snow.