.Juniper - "huh?" name but wtv... Juniper is a type of plant.
.Castelia - eh... Castelia reminds me of "castel" but the city doesn't have any castels so... it's a bit weird of a choice... It's castle, Unova has a medieval theme.
.Minccino - good name. Chillarmy was good too, there wasn't necessity to change but good name anyway. Chillarmy is a horrible name, and I expect Minccino's evolution to be Chillaccino anyway. It matches.
.Gigalith - good. not very changed so... Yeah.
.Munna - I like when they keep their names the same... Yeah.
.Darmanitan - best name of them all. Agreed.
.Sandile - lolwut? reminds me of "sandal" which makes it sound stupid for a name... Why does everyone think sandal? I mean come on...
.Pidove - reminds me of a portuguese cuss word, doesn't sound very good either... overall, the worst name... There are many words that sound like cuss words in other languages.
.Blitzle - the name is cool but doesn't fit with the zebra imo... Doesn't have to.
.Klink - good, nothing special to discuss about it. People seem to don't understand that japanese names are, sometimes, english words (ex: Moltres' japanese name is "Fire"), so its not a matter of Klink being more creative than Gear. Of course, they would change the name. Naturally.
.Moxie and Big Pecks don't sound very good for abilities' names but wtv... that's not my major concern... Do you even get the pun behing Big Pecks? Made me lol.