This is what Diamond & Pearl should've been to begin with. Gen 3's engine still has better performance overall, but Gen 4 is no longer molasses when it comes to it's speed. The Pokedex is a massive improvment and all of the new Pokemon are available during the main story. The Physical/Special split can now be fully realized with previously gimped Pokemon now able to take full advantage of their assets. Single use TM's are still a real pain, and make attempts to build a competitive team for online and the Battle Frontier that much more brain numbing. Sinnoh is arbuably one of the best regions in Pokemon, loaded with charm & personality from the incredible soundtrack & environmental storytelling. Like with Emerald this feels like the complete story compared to Ruby/Sapphire & Diamond/Pearl; Platinum really does Sinnoh & Gen 4 overall justice, and is a top-tier Pokemon experience.