Some stuff I automatically saw:
Wingull and Zigzagoon may replace Panpour and Pachirisu (it's randomized). They aren't a pair, so you can get Wingull and Pachirisu, Wingull and Zigzagoon, etc.
Electrike is now in Obsidia Alley, and some people say that you may only get it at night? Litleo is also in that alley, and some say you may only get it in day. When you interact with Litleo, it runs off to where Vulpix ran off, and you have to beat Klinklang.
(If you were wondering, Blitzle replaces Electrike in Peridot and Munna replaced Litleo's trade).
Vulpix has a 1/18 chance of being a Mystery Egg, the Egg which the Police Officer gives to you in exchange for a Growlithe one.
There's more of course, but I don't have the time right now to correct all of them.