>>45297619No.
One or two are fine, but Legendary Pokemon almost invariably only get worse as you fill in more and more details about exactly how they work and why.
If we suddenly take Groudon, and give it a fucking life cycle, that takes away from the whole "unapproachable deity of reality" thing it has going, and in the case of beings like Palkia and Dialga, they aren't even life forms in the sense that other things are. They are eldritch entities that take physical forms of their whim while they inhabit the physical world.
There are a small handful of legendary pokemon that could pull this off, but that brings us to the other issue.
"Why tho".
Baby pokemon are 100% fucking worthless. LITERALLY the only purpose baby pokemon serve is keeping Light Ball Pikachu and Chancy out of LC, and letting the Hitmons ape eachother's signature moves, which is a shitty idea anyways since fucking Hitmonchan should not want to run High Jump Kick. That's fucking it.
Baby pokemon were a horrible idea the first time, and never got better. Remember fucking Mantyke, Chingling, and Budew? Those incredibly necessary fucking pokemon? That's what you are asking for. More of that.