Thanks Mega Diancie. Anyway, the reason why I like 4th gen a lot was mostly because of all of the Pokemon look really cool like Garchomp, Lucario, Togekiss, Drapion, Weavile, Rotom, etc. and had an abundant amount of legendaries like the Lake trio, Space-Time Duo, Giratina, Heatran, Arceus, Shaymin, Darkrai, etc.
The Sinnoh region was also an amazing region in the DP/Platinum series. Cool gym leaders, good elite 4, cool places such as Mt. Coronet/Spear Pillar, The Three Lakes, the Solaceon Ruins, Eterna Forest, Snowpoint City, etc. as well as good gameplay. HeartGold and SoulSilver were also good too, not only because it was remake of Gold/Silver, but it also introduced new places and an extended gameplay. However, the best part about HG/SS, was pretty much the battle against Red in Mt. Silver. That's pretty much it.