Even though the pokemon now are being a whole lot more childish, at the very least the legendary pokemon aren't resembling of a teltubbie or Barney quite yet. There is hope
We're at 649, and 10 new confirmed for next gen.
You want a more mature Pokemon? Shin Megami Tensei : Nocturne.
Chespin, Fennekin, Froakie (The starters)
Xernas, Yvetail (The legendaries)
Sylveon (The ribbon-type eeveelution)
An electric/normal type lizard that uses solar energy.
A normal/flying red Robin.
A fighting panda.
And a ridable grass goat.
Only 10 A little disappointing x.x
Probably not the only new pokemons.. usually there's around 100-150 new ones per gen, those were just the teasers, if you may.
Don't forget the new Mewtwo form
I haven't actually played through generations 4 and above, but I did play competitive pokemon (web-based) for a few months. It's fun stuff.