Before Pokemon Sun and Moon was even announced, no one even thought that legendary Pokemon would have a pre-evolution. Even though breeding Manaphy with a Ditto will create a Phione, it can't evolve into Manaphy no matter what you do, it's stuck forever as a baby. Back when Manaphy was discovered that it can breed back during generation 4, people speculated that Phione evolve only to be saddened that it can't. From that time to generation 7 (about 10 years) an ability to of a legendary Pokemon breeding had been unique to Manaphy and Phione until that we discovered that Solgaleo and Lunala can create a Cosmog, and that Cosmog can evolve into Cosmoem and then fully evolves into either Solgaleo Lunala. Sadly as of right now, you can only create one Cosmog per game.

Since Gamefreak did something new and unexpected in generation 7, maybe they'll do it again in future game? This brings us here to this thread where we ask; what if legendary Pokemon do have a pre-evolution? What would they look like? Is it possible to catch them as babies, train them, and evolve them into the legendary Pokemon we know and love? It happened to Solgalep and Lunala, would it happen to the others? Even if this happens in the future, this type of uniqueness for Solgaleo and Lunala will be lost. For now, let's talk about and speculate about what if it does happen in the future. I'm not saying that it'll happen in generation 8 since we know basically nothing about the generation 8 games except that it's coming sometime in a year or two.

I started thinking about this when looking back at the pictures that someone on Deviantart made back in 2008-2011. I first looked at them before Sun and Moon was announced and I thought that they're cute and neat, and looking at them now with USUM coming out in a month is what spawned this thread. Keep in mind that these pictures were made back when the generation 5 games are being made and the generation 6 games are just barely becoming concepts. Generation 7 doesn't even exist in any way, shape, or form, and it won't be until 2013! Here's some examples.

Spoiler: Dialga pre-evolutionSpoiler: Palkia pre-evolutionSpoiler: Mew pre-evolutionSpoiler: The Regis pre-evolutionSpoiler: Mesprit, Azelf, and Uxie pre-evolutionSpoiler: Virizion pre-evolutionSpoiler: Darkrai pre-evolutionSpoiler: Jirachi pre-evolutionSpoiler: Rayquaza pre-evolutionSpoiler: Celebi pre-evolutionSpoiler: Lugia pre-evolutionSpoiler: Meloetta pre-evolutionSpoiler: Articuno pre-evolutionThere's more here. LEGENDARY PRE-EVOLUTION by PEQUEDARK-VELVET on DeviantArt

What do you guys think? Do you think it's going to happen in the future? How do you think it would go? Time to speculate!