So I got the demo yesterday because someone in this thread was nice enough to give me there extra one. I got a female Glalie and named her Jaw Breaker(for obvious reasons). I haven't seen anything too out of the ordinary although I did run into an old man who said he was from the Cave of Origin on one of the missions and he also mentioned Mt. Pyre. Idk if anybody else has run into him, I hadn't heard about it till I saw it.
The battle with the final expert was much easier then I thought it would be lol. People were making it sound so difficult. This is the strategy I used:
Swampert vs Blaziken: Took some damage from Slash cuz he's faster but Hydro Cannon still pwned it.
Blaziken vs Sceptile: Took about half damage from Aerial Ace but Blast Burn sent him packing.
Sceptile vs Swampert: Mega evolved Sceptile and then one Leaf Blade KO'd Swampert
Sceptile vs Hariyama: One Aerial Ace to do a little bit of damage then a Frenzy Plant was enough to wipe him out, went down to about half damage from Vital Throw but I still made it work.