Super Smash Bros. Brawl. After Subspace Emisary, any other single player mode they have come up with feels like shit.
Also, Kingdom Hearts. The first one. I feel like everything went downhill from there. Not only it has my favourite combat in the series, but unlike the future titles... it's worth for more than its combat. You had platforming sections, puzzles... also your allies seemed to keep up with you pretty much all the time. They were able to take care of enemies themselves and even do significant damage to bosses.
All of that was lost in the future titles. Cutscene, walk, battle, walk, battle, cutscene, miniboss, cutscene, walk, battle, walk, boss. And that's it. And allies are completely powerless. By the end of the game, they won't even be able to keep up with you because you can fly, dash and roll mid air and they can't. They seem like a joke...
