29. Pokemon Ruby
Until recently, I bought and played every mainline Pokemon game that came out. I was there when Pokemania first started in the late 90's and while I enjoyed the first two games imo the series reached it's peak in the third generation. It introduced a great set of new Pokemon, while mixing in plenty of old favorites, May and Wally made for a great pair of rivals. Altho their plans were demonstrably insane Team Magma and Team Aqua had great designs and I loved the land vs sea theming. The graphic improvement was also head and shoulders above its predecessors and I even today I prefer the sprite work of that time to the current 3D models. And one of my favorite parts was the existence of Hidden Bases. As a kid that appealed to me so much, to have a secret spot that you could arrange and decorate with all the various little items and collectibles found across the world. This one might be some nostalgia talking, but Ruby remains my favorite of the series.