I don't see why some people are complaining about the designs. Like already mentioned there has to be a way to differentiate between old pokemon and new pokemon and as times progress designs change. The newer pokemon are just as simple-designed as the older generations. It just appears to some of you that they're not. I mean come on I have yet to see a pokemon with a helicopter, an AK-47, and a flame thrower strapped to its back so until then most pokemon are simply designed in my opinion.
Another thing, if you aren't pleased with the designs then don't play the games. Really, it's just as simple as that. I'm not trying to sound rude, but it just irks me when people complain about things like these when Game Freak spent YEARS developing it trying to please pokemon lovers everywhere. We should all be thankful we have so many pokemon and that pokemon didn't take some long hiatus like Digimon has after the 2nd or 3rd gen. Coming up with so many new pokemon has to be tough. I know for sure I would have never been able to design Reshiram, Zekrom, Zoroark/Zorua, or the starters on my own. :D