Carassius Auratus

It might not be as long as some of the other main series Pokemon games, but the story was still amazing. The rivals all had their own unique personalities and stories, and the Gym Leaders and Champion had an actual part in the story, unlike the other games where they just sat in their gyms doing nothing all day until a challenger showed up. The open camera controls in the Wild Area were also really great. The only complaints are that I wanted it to be longer, and it was also hard to NOT be over-leveled.