Ok. Me and my little brother were thinking about something. My little brother thinks that since

Baby Evolution says this counts as evolving Happiny, that he can evolve into Chansey, then into Blissey. We know that in the past it has been a rule that you can't do that. So my little brother compared it to Caterpire SW Pupate and Metapod SW Emerge. Since it says it counts as evolving the pokemon. Can you use both powers in a turn to evolve? can you use Baby Evolution and then Evolve to Blissey
Thanks