This is all for RM2K3.
1. Is there any way to permanently change the Random Monsters that appear in rooms after a certain event?
2. Is there a way to make the Hero invisible temporarily for cut scenes and stuff?
3. Is there a way to make Party Members "walk out" of the Hero? You know, like in FF1/FF7.
1. Copy the map with different random monsters and have the event trigger the teleporters to take the player there.
2. Change Hero sprite to clear. Don't forget to change it back after the cutscene.
3. Set the events either under or over the hero and you can have them walk out from him. It should be easy enough to make them appear in the same place since the hero is not an event. Just have him walk on top of it. Create seperate pages for each character.
Don't forget to set up events at the point in which the other party members stop. Turn them on when that event reaches the character's stopping point (on event touch). Then, have the original event turn invisible and walk back as a parallel process. In doing so, you can make multiple characters appear by using event pages and switches. That might be the easiest way to accomplish this.
I would probably have them step out and stand beside the character in one direction or another for the switch. That would make the transitions quick and more seemless.
You could also create invisible events around the hero, which pass over or under him and activate on hero touch, probably. If you create one that passes over and another that passes under, they could both appear at the same time.