The thing about the Baby Rule only applied to baby Pokemon before EX Ruby&Sapphire, when they had the potential to end the opponent's turn instantly when attacked. (And yes, they said 'Evolves into', and 'Put ____ on the Baby Pokemon'. Baby was its own stage.) Any new babies with the 'Baby Evolution' Poke-Power must be evolved by using the Poke-Power. They cannot be evolved any other way, because on neither the new Electabuzz or Elekid can you evolve the latter into the formal by normal means - the Poke-Power must be used. Therefore, if Glaceon Lv. X is active (or you have something like Fossil Muk, Muk ex, or Ampharos PL), babies cannot be evolved (in the case of the last one, only if they have damage counters).