Gosh, I love pokemon sooo much it is such a great series. But, Kingdom Hearts has an amazing story, amazing soundtrack, and unforgettable twists on classic disney stories. This game series has so much heart, pun intended, that I gotta give the vote to it. These games make me so emotional. :')
Kingdom Hearts has a better storyline than Pokemon. It also collaborates with Disney, Square Enix and its own original cast of characters. I prefer the soundtracks in Kingdom Hearts over that of Pokemon. The themes of Good vs Evil, Light vs Dark, love and friendship seem to captivate me. I just find Kingdom Hearts to be one of the best games ever. The nostalgic effect it has on you after watching Disney Shows and playing Final Fantasy games. Watching both of them come together to fight with and against each other. It's like having two different crews of loving friends and fretful enemies come together to do something great!
Pokémon isn't the same as it used to be. After let's go Eevee/Pikachu I dislike it now. It doesn't have same nostalgic feel as when I was a kid. And I've been a fan since it first came out. Kingdom hearts is more challenging and better now in my opinion.