The extreme change is explained in the description on the official website

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On tuesday I got a great new Land Rover Range Rover from having earned $8752 this last four weeks.. Its the most-financialy rewarding I’ve had.. It sounds unbelievable but you wont forgive yourself if you don’t check it
!m226d:
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Omg, I can see that there’s a clothes shop, a TM-like store and some sort of hair cutting boutique, so CUSTOMIZATION confirmed!

Alolan Exeggcutor 10/10 Pokemon!

Yes but as an event, and that was expanded on in OR/AS where it finally made sense, like they made it, and decided, heck lets release it on this game instead. So not part of the actual game like Charizard is.

They did put just Torchic in XY to be fair, they left out Sceptile and Marshtomp.

I never once said in the wild for Charizard, and we have seen Lapras in battle, I think the Tauros, despite being not in battle, we’ve seen multiple on a ranch, so I’m sure they will be in the wild, I don’t see wh ythey wouldn’t, which brings us to Sharpedo, I’m not sure why there would just be 1 Sharpedo, and it does seem like the right environment, so I’m pretty sure those will be wild too, or at least Carvhana.
Charizard really is the big what if, we need to really know who the one in charge of the Ride service is, and the reason for using the Pokemon they have.
Blasoise was in the reveal trailer being used on a firetruck, whether or not that’s in the final game we’ll see. But it’s very possible that someone would give us the Kanto Starters, which tbh I don’t see the need for, given we can move them from gen 6 and VC1 but then again, similair things have happened. I Don’t see it not being in the regional dex if it’s clearly in the region though, and it doesn’t garauntee the other 2, they do tend to favour Charizard, but it wouldn’t make sense to just have him, but we’ll see

no bc in the gameplay they showed final evolutions. but they summoned a pre-evo into the battle