I have an idea. Since we don't have baby pokemon like, pichu, igglybuff, and more recently azuril, I was thinking a good way to include these pokemon in the game instead of adding them to their evolutionary lines would be to add a support system. What I mean by this is that they would be like the items, but instead of healing you or slowing the opposing team's pokemon down, they could battle with you. They wouldn't have much health and would be on a cool down, so if they faint they come back after 30 seconds to a minute. Another thing they could do is use them as items like potion and slow smoke. An example of this is using igglybuff to put the pokemon around you to sleep.

I really hope they add baby pokemon to the game in some form, the game seems incomplete without them.