Hm, Magneton not evolving into Magnezone I can understand, as it only can evolve at Mt Coronet in Sinnoh. Besides it's a fourth gen. Pokémon, and the storyline's mostly second gen. if I'm not wrong.
Sneasel>Weavile, I actually thought it would be, but as I realised, there too, it would be a gen4 pkmn. It wouldn't be much of a remake if they'd thrown in a bunch of pokémon not belonging there.
I don't think there's that much to discuss on that subject, were there something special you had in mind, wanted to know, when making this thread? =/
(sorry for sounding dull and making typos, I'm very tired atm...)