Nope. There was an obvious trend with jynx electabuzz and magmar. Not today, but originally. All three got preevolutions in g/s/c. This in some ways shows some sort of connection due to the fact that they are the few pokemon to get pre evolutions in gen 2. Igglybuff/Cleffa are counterparts and their species always have been. Tyrouge brought two counterparts into one species. Pichu was the required baby form of their mascot. Of everything, the only place smoochum belongs is alongside electkid and magby, as it 1. has no other reasons why it would be there (there are other things that needed baby evos *glares at kanghaskhan, onix*) and 2. Why would something so inaccessable (in r/b/y, its only obtainable through in-game trade) even be of much importance to get a preevolution unless it had some connections? My guess is they were going to give it a far more beautiful evolution in gen 4, but switched out for either rhyperior or frosslass because they couldn't think of a way to fit it in with the others. So, perhaps it will become paired with another pokemon such as mr.mime this gen. Or maybe mr.mime and sudowoodo.