if pokemon involved a choice system, in which the choices you made determined what pokemon you end up being able to catch and where you would end up in the game good or evil, etc., how effective would you think this would be in terms of interest in gameplay and interactivity?

Well, the games would become a lot less popular due to people wanting a certain pokemon and not being able to catch it, but then interactivity would increase due to the amount of trading people would do to get those desired pokemon unavailable to them.

Yea, interactivity would go up, but the amount of effort to trade would make people feel like it would be too tedious.