From what I've gathered, traveling from Kanto to Hoenn (or vice versa) has the following effects:
-Your party gets removed and put on the PC, but you can get it back as soon as you get to the second city
-Badges you've won in the first region have no effect in the new region, so you can't use HM moves until you get the proper badges in the second region
-You can't go back to your first region until you collect 4 badges in the new region, regardless of how far you were in the original region
Is that right?
Some questions:
Is it true that your key items and HMs disappear while you're in a different region from the one you got them in?
Since you get to keep your mons, does that mean that the gym leaders and other NPCs of a region will have higher levels if it's your second region? Or they keep the same party and levels, meaning that you'll be easily stomping everything?
Thank you