Needed a Water type and a type that could handle Fairies, so I spent hours finding/training/befriending the perfect-natured Skrelp. Oh well. Her evo is awesome, though. And I still need a Water type. That barnacle thing, though, creeps the jeepers outta me. Maybe I'll see where Clauncher leads next.
Chespin learns like all my favorite attacks, holy cow. You could pretty much pull a lotto for each of his four moves at random and the result would be fun and useful. I love this guy.
I'm also pretty pleased with the new Berry mechanics. You don't realize how much you've always wanted to be a horticulturist until Pokémon games let you do it.