The gameplay is heavily based around the fifth generation of Pokémon.
It gives the game a rather distinct look and a look that I feel works very well. This is one way that I feel the fact the game was made with RPG Maker shines through. The visuals of Pokémon Sage are fantastic. The Pokémon are heavily designed on actual species that you would find in Latin America so that is cool. Even the starter Pokémon that you can have, Aguade, Foliat, and Kidling are all created for this game. It also makes it a game that is far less predictable than other Pokémon fan games.
A ton of new Pokémon was created just for this game and that makes it pretty awesome. One of the best things about this game is the Pokémon that you can capture.