i doubt ash will catch a pokemon that mega evolves. If best wishes was supposed to be the new kanto and kalos the new hoenn wouldnt ash's 6th pokemon be caught after the 8th gym, then he would take with him to the new sinnoh, like aipom.
Or he can call on infernape,sceptile,charizard and mega...
cilan and iris catch new pokemon.
team loser catches new pokemon or the ones they got now will evolve.
i can see snivy and Oshawott evolving.
just because we didn't see their evolved forms on the opening
doesn't mean they wont evolve in the next 30 episodes.
also i don't care about team...