>>28418076>Considering they're doing only gen 1 PokemonLeaker here, advertising staff decided to take advantage of Pokemon GO hype by filling the reveals with gen 1 pokemon to get the interest of those only familiar with Pokemon GOs offering. You'll notice that pokemon battled in these trailers went from all gens to rarely anything outside of gen 1, this is also part of that advertising strategy.
Each gen actually gets ~5-10 alolan lines on average, with version exclusives as well as day/night exclusives (each pokemon in a line does not necessarily get a form).
