In response to number 4:
Pokemon Gold and Silver had 16 gyms. 8 in Kanto and 8 in Johto. You started off in Johto, then you fought the trainer from Red and Blue in Silver Cave- which is in a mountain ridge between the two regions- he has a level 80 Pikachu. I think G/S/C was the only game to truly improve over its predecessors, and be a true sequel.
Takam- the games should never be like the cartoon- since the cartoon is based off of the games. Diagonal movement would ruin traditional elements of the game as well. All the puzzles/obstacles/dungeons in the game practically revolve around this element.
If GameFreak took Pokemon back to basics, then it could be awesome again. They're making too many Pokémon. They're being made for the sake of being made, and the developers have less time to focus on other aspects of the game, then. In Gold- instead of making a new Pokemon- they'd find new places to find the other ones- like headbutting a tree to find a wild Butterfree/Beedrill, or the day/night factor. Sure, there were a hundred more Pokemon- but some of them were just evolutions, and they were spread out over two regions. So you could actually get them as you went on your way- not getting them all hundreds of hours after completing the main game itself. Now they put the regular amount into the main land- and try to cram as much as they can of the remaining ones into a pathetic excuse for an extra land. Woo, three routes and a "battle area" that you don't really want to play anyway, and kind of defeats the object of beating the Pokemon League to be the best trainer ever when there are trainers there who are stronger than you. Seriously- they just crammed all they could into there. And then they made some randomly spawn in "swarms", and the "Pokéradar". That's 6 methods it takes to get all the Pokemon (tall grass, trading and breeding too). That's proof there's too much being added.
Pokémon Gold was perfect. There was no nonsense- the legendaries were actually done during the story line- well could be, and after beating the Pokemon League, you actually got a decent reward. A ride on the S.S. Anne to Kanto, to beat another 8 Gym Leaders- see how it's changed in 7 years, and complete more of the story line. When I found Jasmine in Sunyshore City in Diamond, she said "I'll tell you more about Johto", and I was very disappointed to find there was no Johto- let alone a mention of it. There was tons of cool stuff in it that isn't in Diamond or Pearl still. You could give your mum a share of your money, and she'd buy you things with it sometimes. Be it a potion or room decoration. The Underground feature is pointless to me in D/P. Nothing was pointless in G/S/C, and the fact you could properly trade with R/B/Y was also awesome. I'm still waiting for a G/S/C remake- but the islands in FR/LG probably stopped that, because the Pokemon outweigh the game itself now.
Your rival actually was a rival- and a villain. Not your best friend. He literally knocked you flying- and stole his Pokemon. An actual bad-ass.