I frown upon this. Mainly, because this is impossible on the cartage games unless you were to hack it. Since every other metagame is possible in the actual Pokemon games, this should never be an official metagame due to the fact that this technically isn't Pokemon. Additionally, even with the same base stats, some Pokemon still will be sent into obscurity. Even though eveloutions have superior movepools, the improvements are varied.
I do, however, like the idea behind it, in attempting to give some Pokemon a second chance.