There are a lot of things I would improve in the games.
• The battle scenes need to look more realistic. The backgrounds during a battle are rather safe and somewhat tedious. It would be nice if you saw an actual scenery behind the attacking Pokemon to make it seem more realistic.
• There should be attack animations. I read on a post earlier that it looks like a flamethrower is coming out of Charmander's belly. That is one of my few major turn offs to the game.
• In the beginning of every game, when first starting out, the Professor tells you that your journey will be dangerous and whatnot. How is traveling through grassy routes dangerous? Every main-adventure game is exactly the same when it comes to fundamentals. They should have side missions in the game that help you reach certain goals.
• The cries need to be better. The MIDI files are okay, but it makes it sound like the Pokemon swallowed a boom box. They should have different growls and roars and such.
• Legendaries are getting seriously out of hand. I mean, 15 legendaries in Sinnoh alone is more than the other three regions combined. In my opinion, the supposed "magical beasts of myth" are losing their pristine. I was very disappointed at this turnout of legendary overhaul.
But then again, what do I know? lol These are just my opinions. Feel free to disagree!
Zach~